Leptoceridae 
Mending and with the last Joint long and simple, anil tin 1 
win.. SIM! ;.-'-ui i :iiu M,in<ivv. Tiie larval cases 
are tubular and free, and are found in l.th .standing anil 
running wuter. Tlliw instvtrt ;irr fount! ull over the 
nrlil ; about 60 speck* are Knropean ; some exotic mi, < 
in i- ill if the largc-st uf tlu-ir trilif. 
LeptOCerUB (lep-tos'o-rnsj, . [NL. (beach, 
1SI7), < (jr. >f-rdf, thin, line, delicate, 4- iclpaf, 
horn.] 1. The typical genus of Li-ftim-i ri<tn . 
haviug tlio neuratiou of tho fore wings differ- 
ent in the tun sexes. The larva) are slender, and In- 
liiihit ti'i-i- tiilitititr canes. There are 10 European species, 
and tile genus is also represented in northern Asia and 
America. 
2. A genus of curculios, now culled Naupactvs. 
Srlitiiihrri; I Slit!. 
leptodactyl, leptodactyle (lop-to-dak' til), a. 
and it. [< XL. leptodactylux, < MUr. /.arroid- 
KTv'Aof, with slender toes (or fingers), < Or. fe- 
irror, slender, + cJao-rtiXof, a finger or toe.] I. 
a. Having small or slim toes. Also leptodac- 
tylous. 
II. a. A bird or other animal having slender 
toes. 
leptodactylous (lep-to-dak'ti-lus), a. [As lej>- 
Inilnctyl + -ous.] Same as leptodactyl. 
Leptodera (lep-tod'e-rS), . [NL., < Or. /.t- 
nrof, thin, fine, slender, -r- (Se/wf for Aepfia. skin, 
hide.] A genus of vinegar-eels of the family 
Anguillulitbe. L. oxypkila IB tho vluegar-cel formerly 
called Anguillula aceti. The same or a very similar spe- 
cies fount] in sour paste 1s L. fjlutinitt. The form is as 
simple as possible, being cyllndric and tapering, the mouth 
a sliitht opening, and the length less than one twelfth of 
an inch. 
Leptodqra (lep-tod'o-rfi), . [NL., < Gr. '/>- 
T-df, thin, fine, slender, + Sopd, a skin, hide.] 
The typical genus of Leptodorida. L. hyalinu 
is an example. Lilljebory, 1860. 
Leptodorida (Iep-t6-dor ; i-de), n. pi. NL., < 
Le/ilodora + -trite.] A f amily of daphmaceous 
crustaceans, of the order Cladocera, represented 
by the genus Leptodora. The form is very peculiar; 
there arc six pairs of ambulatory feet ; the abdomen is very 
long and segmented, and there are no respiratory organs. 
There is a rudimentary shell in the female only. These 
water-fleas grow to an inch in length, and occur in fresh 
water in both America and Europe. 
Leptogaster (lep-to-gas'ter), H. [NL., < Or. 
Xr jrTo'r, thin, fine, slender, + yaarr/p, stomach.] 
1. A genus of robber-flies or Asilidce, founded 
by Meigen in 1804, having tho face very narrow 
and the abdomen long and slender, whence the 
name. There are about 12 European and near- 
ly 20 North American species. 2. A genus of 
reduvioid heteropterous insects, containing one 
Madagascar bug, L. flaripes. Signoret, 1860. 
3. A genus of dragon-flies. Hagcn, 1861. 
Leptoglossa (lep-to-glos'a), n. pi. [NL.,< 
Gr. /teirrof, thin, fine, slender, + yl.uaaa, the 
tongue.] 1. A division of LaccrtiUa, including 
lizards with slender cleft protrusile tongue: 
same as Fissiliuguia. 2. In Cope's classifica- 
tion, a suborder of lizards. 
leptoglossal (lep-to-glos'al), a. [As Lepto- 
glossa + -<il.] Having a slender tongue; spe- 
cifically, of or pertaining to the Leptoglossa. 
leptoglossate (lep-to-glos'at), a. and n. [As 
Leftoflotxt + -ate 1 .] I. a. Pertaining to the 
f.cntoglossa, or having their characters. 
II. n. A lizard of the group Leptoglossa. 
Leptoglossus (lep-to-glos'us), w. [NL., < Gr. 
Xfjrrof, thin, fine, slender, + y'f.aaaa, the tongue.] 
1. An important genus of coreoid bugs, having 
Leptoglostus phyttopus, highly magnified. 
the hind tibiaj usually expanded, erected by 
Guerin in 1830. The species are subtropical. L.phyl- 
215 
341B 
loptu is common in the southern I'nlted Stetw, where It 
injures cotton-bolls and oranges. 
2. A genus of Austr:ili:iii myzomeline birds. 
Niriiiiisnii. 1*:!7. Sec .tctiHtlmrhyneliux, 1. 
leptogonidium(lep'to-go-nid'i-uin), H.; pi. lr/i- 
iiii/niiiiliii (-11). [NL.,^Gr./U>rT(>f,thin,flne,slen- 
di !, + NL. yom<Htim. ] Same as goiiiilimium. 
Leptolepidse (lep-to-lop'i-dc), . j>l. [NL., < 
Li'litiilepis + -ida'.] A family of extinct ami- 
oid fishes, typified by the genus Leptolcpis, with 
the vertebra; ossified, tho tail hotnocercal, the 
scales cycloid, the fins without fulcra, the dor- 
sal fin short, and teeth in bands mostly minute, 
but some developed as canines in front. The 
family flourished in Liassic and Oolitic epochs. 
Leptolepis (lep-tol'e-pis), n. [NL., < Gr. ?.t- 
~Tof, thin, fine, small, + Xfir/f, a scale: see le- 
pix.] The typical genus of Leptolepida;, contain- 
ing elupeifonn fishes with small scales, whence 
the name. 
leptology (lep-tol ' o- ji), H. [< Gr. 
minute description, also quibbling, < 
fine, minute, + -2o)'/a,< Mytiv, speak: see-oloirj.] 
In rlut., minute and detailed description. 
leptome (lep'tom), n. [< Gr. Xejrrdf, thin, fine, 
slender.] Same as bast 1 , '2. Potonie. 
Leptomedusae (lep'to-me-du'se), n. pi. [NL., 
< Gr. XtTrof, thin, delicate, + NL. Medusa.] In 
Haeckel's classification of hydrozoans, the ea- 
lyptoblastic hydromedusans, as the campauu- 
larian and sortularian polyps, regarded as an 
order of Mvdu.ua: See C'alyptoblastea. 
leptomedusan (lep'to-me-du'san), a. and n. I. 
a. Pertaining to the Le'ptomeduws, or having 
their characters; calyptoblastic, as a hydro- 
medusan. 
II. n. One of the Leptomedusa" ; a calypto- 
blastic hydromedusan. 
leptomeninges(lep'to-me-nin'jez), a. pi. [NL., 
< Gr./CTTof,thin, fine, slender, + it^viy^(iaiviyy-). 
a membrane: see mviiiiix.] In mint., the pin 
mater and arachnoid. 
Ieptomeningiti8(lep-to-men-in-ji'tis), . [< lep- 
tomeninnen + -itis. Of. 'meningitis.] Innathol., 
inflammation of the pia mater and arachnoid. 
Leptomeria (lep-to-me'ri-S), n. [NL. (R. 
Brown, 1810), so called from the small delicate 
flowers; < Gr. Acnrdf, small, slender, + /tipof, a 
part.] A genus of dicotyledonous apetalous 
plants, of the natural order Santalacei? and tribe 
Osyrideie, with minute hermaphrodite flowers 
crowded in terminal or lateral racemes or 
spikes, and small drupes, sometimes with a 
fleshy exocarp. Fourteen species are known, all natives 
of Australia, broom-like shrubs with angular or roundish 
twig-like branches, mostly destitute of leaves except on 
the young twigs. L. UiUardieri is a pretty shrub, six feet 
high,with white flowers and greenish-red berry-like drupes, 
the pulp of which is pleasant, acid, and slightly astringent : 
the drupes are called native eurranit in New South Wales 
and Victoria. Remains of plants of this genus occur in 
considerable abundance in nearly all the deposits of the 
Tertiary age in Europe. 
leptomorphic (Iep-to-m6r'fik), a. [< Gr. )(- 
jrrof, thin, fine, + /^op^;/, form.] An epithet 
proposed by Gttmbel to designate those mineral 
constituents of rocks which, although crystal- 
line in structure, are not bounded by their own 
proper crystalline faces. It is nearly the same 
in meaning as the "allotriomorphic''of Rosen- 
busch. 
lepton 1 (lep'ton), H. ; pi. lepta (-tS). [< Gr. - 
jrrov, a small coin, prop. neut. (sc. "vA/ua/ut, coin) 
of tenrof, thin, fine, slender, small, lit. peeled, 
stripped, < Mireiv, peel, strip. Cf. Lepas, lepis.] 
The smallest coin of modern Greece, equal to a 
centime. One hundred lepta make a drachma. 
Lepton' 2 (lep'ton), n. [NL., < Gr. ).CTTTOV, neut. 
ot fo-Trrof, fine, small, delicate.] The typical 
genus of Leptonidte. The shell resembles that of 
Ktllia, is often mindtely punctured, and has divergent 
teeth. There are many species. L. squamogum and L. 
conoexum are British. 
Leptonidaa (lep-ton'i-de), . pi. [< Lepton- + 
-iaa:.] A family of siphonate dimyarian bi- 
valves, typified by the ge- 
nus Lepton. They have the 
mantle extensile beyond the 
slu-11, and furnished with a row 
of filaments (one of which is 
enlarged and prolonged in 
front); a single short siphon: 
two branchiae, complete and 
separate ; foot thick, tapering, 
and with a byssal groove ; and pnon j 
equlvalvesnlK-i|mlMi-i:il valves, inent' 
gaping at the end, with an in- 
ternal ligament and simple pallial impressions. Then U 
one cardinal tooth on each side of the cartilage-pit (some- 
times on one side only); of the lateral teeth there are on 
<-;.rh -iili- twi. or only one. 
leptophloe'm (lep-to-tto'em), n. [< Gr. /fjrror, 
sfencter, + K. yi/i/wm .] A rudimentary phloem : 
Leptoptilus 
applied by Vnizey to the phloem "f the inner 
tissue in the seta uf some mosses. Compare 
li I'liu'l/li III. 
Leptophloeum (leji-to-fle'mn). . [NL. (Daw- 
son, 186.'), < Gr. /cirri*;, thin, tine, delicate, + 
<t>s.ot6f, bark.] A lycopo<liaceouM fossil plant, 
allied to Lf/iiiliMtiiidiini nml found in the De- 
vonian of Maine, New Brunswick, and the ad- 
jacent region of northeastern America, and also 
in beds of similar ago in Australia. The stem U 
covered with broad rhombic leaf-bud or -cushions, each 
with a single small vascular scar a little above its center, 
and above this a very alight furrow. This U a characteris- 
tically Devonian geuu*. 
Leptoplana (lep-top'la-nft), n. [NL., < Gr. 
XejrTof, delicate, + RUMft a wanderer, < n-/4vof, 
wandering: see planet.] The typical genus of 
Leptoplanida. L. tremellaris is a Mediterranean 
species. 
Leptoplanidse (l<'p-to-plan'i-de), n. j>l. [NL.,< 
Lepti>iil<nia + -idis.] A family of digonoporous 
dendrocoelous turbellarians, typified by the ge- 
nus Leptoplana. It contains marine planarlam with 
a flat, broad, and usually very delicate body without dis- 
tinct cephalic region or tentacles. eye more or lew numer- 
ous, mouth usually in advance of the middle of the body, 
and the genital openings behind the mouth. 
leptopod(lep'to-pod),a. [AeLeptopod-a.] Slen- 
der-footed, as a member of the Leptojioda. 
Leptopoda (lep-top'o-dft), n. pi. [NL., < Gr. 
fenr6f, thin, fine, delicate, + volf (vo6-) = E. 
foot.] A group of rostriferous gastropods with 
the foot compressed and adapted for leaping, 
composed of the families Strombidce and I'lmri- 
dte. J. E. Gray, 1821. 
Leptopodia (lep-to-po'di-a), n. [NL., < Gr. >r- 
irrof, tnin, slender, + iroi'( (JTO<!-) = E./oot.] A 
Long-leggeii Spiiler-crab ^Ltptopodia tafittarfa}. 
genns of spider-crabs, founded by Leach in 
1814. They have a small triangular body with a long 
acute rostrum, and extremely long, slender legs. L. myit- 
taria, whose body is less than an inch broad, has legs near- 
ly a foot long. 
leptopodlan (lep-to-po'di-an), n. [< I^eptopodui 
+ -an.] A crab of the family Lcptopodiida-; a 
spider-crab or sea-spider. 
Leptopodidse (tep-to-pod'i-cle), n. pi. [NL., < 
Ijeptopoda + -ida'.] ' In entom., a family of Hc- 
teroptera, represented by the genus Leptopui. 
Also Leptoiiida:. 
Lcptopodiidae (lep'to-po-di'i-de), n. pi. [NL., 
< Leptopodia _+ -id<e.] A family of brachyu- 
rous decapod crustaceans, named from the ge- 
nus Leptopixlia; the spider-crabs. 
leptoprosope (lep-to-pros'6p), n. [< Gr. fonroc, 
thin, narrow, + ir/>&GU7rov, face: see Prosopis.] 
Narrowness of the face; the possession of or 
condition of having a long, narrow-faced skull. 
leptoprosopic (lep/to-pro-sop'ik), a. [< lepto- 
jirot/tipe + -ic.] Having a long narrow face, as 
a skull. 
The mid-facial Index . . . could be accurately deter- 
mined in the three Yasinew skulls, in which it is very 
constant and averages 54.2, making them dolichofuclal, or 
Itptopnuopie. Jour. Anthrop. Imt., XVIII. 28. 
/, foot ; ft, mantle : t, si- 
phon ; /. tentacular fila- 
Laptops (lep'tops), . [NL.,< Gr. fonrof, thin, 
fine, narrow, + ii^p, face, eye.] 1. A genus of 
fishes, the mud-cats, of the family Silurida and 
subfamily Ictalurinte, with large flattened head, 
projecting lower jaw, and peculiar dentition. 
L. olivaru is a large catfish living on muddy bottoms of 
streams and lakes in the southern and western parts of 
the United States. Kafinaque, 1820. 
2. In entom., a genus of snout-beetles, of the 
family Curctilionida; comprising many Austra- 
lian species of large or medium size, whitish or 
brown color, with narrow linear vertical eyes 
and a distinct scutellum. Scln'inherr. 1834. 
Leptoptila(lep-top'ti-la), n. [NL., <Gr. /orror, 
thin, fine, delicate, + -ri/ov, feather.] A genus 
of American wood-pigeons, containing about 
a dozen species, whose outer primaries are in- 
cised ; attenuate, and bistoury-like at the end ; 
the pm-wingdoves. The tarsi are bare ; the tall has 12 
feathers: tin- lining of the wings is chestnut; the neck is 
iridescent : and there are no metallic spots. The genus 
is also called EngyptHa. I., or K. albifront U found In 
Texas and Mexico, L. jamaictntis In Jamaica. 
Leptoptilus (lep-top'ti-lus), it. [XL.. < Gr. 
, thin, fine, delicate, + STI/OP, feather.] A 
