Eurypteridae 
The powerful body of the Eurypterida . . . consists of 
a. cephalothoraeic shield with median ocelli as well as large 
projecting marginal eyes, also of an abdomen with nu- 
merous segments (usually 12), which become longer poste- 
riorly, and of a caudal shield, which is prolonged into a 
spine. Round the month on the under side there are five 
pairs of long spiny legs, of which the last is much the 
largest, and ends in a broad swimming nn. Some of the 
anterior appendages may be armed with a chela. The re- 
semblance of the true Eurypteridae ... to the Scorpion!- 
' 's very striking. Claim, Zoology (trans.), I. 479. 
2032 
Eurypterina (u-rip-te-ri'na), n. pi. [NL., < 
Eurypterus + -MM&] " Sarnie as Eurypterida. 
eurypterine (u-rip'te-rin), a. and n. I. a. Per- 
taining to the Eurypterina. 
II. n. One of the Eurypterina. 
Eurypterus (u-rip'te-rus>, . [NL.,< Gr. evpiig, 
wide, + KTtp&v, wing.] 1. The typical genus 
of Eurypterida;. E. remipes is an example. De 
Kay, 1826. 2. A genus of hesperid butterflies, 
the type of which is E. (jigas of the Peruvian 
Andes. Mabille, 1877. 
Eurypyga (u-ri-pi'ga), n. [NL., < Gr. cvpi>s, 
broad, + irvytj, the rump.] A genus of birds, 
Dollar-bird (Eurysl, 
eurythmy (u-rith'mi), . [Also, improp., eu- 
rithmy ; <Gr. cvpvBfiia, rhythmical order ormove- 
ment, harmony, < evpvOfiof, rhythmical, orderly, 
< el, well, + /Mfyiof, rhythm.] 
Star-coral ( Rusmilia knoeri}. Left 
branch shown in section. 
Sun-bittern (Eurypyga helif. 
constituting the family Eurypygidce. E. helias 
is the South American sun-bittern. Illiger, 
1811. 
Eurypygidae (ii-ri-pij'i-de), n. pi. [NL., < Eu- 
rypyga + -idee.'} An American family of altri- 
eial grallatorial birds ; the sun-bitterns. They 
mage of variegated colors. They lay blotched eggs. There 
is but one genus, Eurypyga. 
Eurypygoideae (u"ri-pi-goi'df-e), . pi. [NL., < 
Eurypyga + -oid-ece.] A superfamily of birds, 
composed of the Eurypygidce, or American sun- 
bitterns, the Rhynochoetidw, or kagus, of New 
Caledonia, and the Madagascan Mesitidai. 
eurypylous (u-rip'i-lus), a. [< NL. eurypylus, 
< Gr. evpvKv\fif, with wide gates, < evpvf, wide, 
+ TTv^r/, a gate.] In zoo!., having large and 
wide openings, placing the endodermal cham- 
bers in direct and free communication with both 
excurrent and incurrent canals: said of a type 
of sponge-structure. 
This may be termed the eurypylous type of rhagon canal 
system. Sollas, Encyc. Brit., XXII. 414. 
Eurystomata (u-ri-sto'ma-ta), n. pi. [NL., 
neut. pi. of eurystomatus : see eurystomatous.] 
An order of ctenophorans, having an oval or ob- 
long body without oral lobes or tentacles, and 
a very large mouth, whence the name. Beroe 
and jfeis are examples. 
eurystomatous (u-ri-stom'a-tus), a. [< NL. 
eurystomatus, < Gr. as if "sitpvaTo/iaro^, equiv. 
to evpiiaro/ioi, wide-mouthed, < evpi<<;, wide, + OTO- 
fia (ar6uaT-), mouth.] Having a wide or large 
mouth. Specifically (n) In herpet., having a dilatable 
mouth, as most serpents ; not angiostonmtous. 
The two halves of the jaw are movably connected to- 
gether in the euryxlomatous Ophidii. 
Gegenbaur, Comp. Anat. (trans.), p. 463. 
(b) In ctenophorans, pertaining to the Eurystomata. 
Also eurystomous. 
eurystome (u'ri-stom), n. A bird of the genus 
Eiirystomiis. 
eurystomous (u-ris'to-mus), a. [< Gr. evpiiaro- 
/jof, wide-mouthed: see eurystomatous.] Same 
as eurystomatous. 
Eurystomus (u-ris'to-mus), . [NL., < Gr. ri>- 
piicTofiof, wide-mouthed: see eurystomatous.'] A 
genus of African, Indian, and Oriental picarian 
birds, of the family Coraciidas, having the bill 
dilated and the coloration lilac or blue; the 
broad-billed rollers. There are several species, of 
which /-,'. in-ifti.tfdis, one of the best-known, is chiefly blue, 
with red bill and feet, and about 11 inches long. A sec- 
tion, Cornopw, contains the ruddy African and Madagas- 
can eurystomes. 
Eustathian 
Eusmilia (u-smil'i-a), . [NL., < Gr. eii, well, 
-f njut.ti, a knife for cutting.] A genus of star- 
corals, or epo- 
rose madrepo- 
rarian stone- 
corals, of the 
family Astrtei- 
dce, having a 
cespitose po- 
lypary. The 
polyps are pro- 
duced by fis- 
sion, and re- 
main only ba- 
sally connect- 
ed. E. knoeri 
is an example. 
Eusmiliinae (u- 
smil-i-i'ne), n. 
pi. [NL.,<.EM- 
smilia + -ina;.] 
* m tne /me A group of corals, taking name from the genus 
arts, harmony, orderliness, and elegance ot pro- j^ lismi iia. Also written Eusmilince. 
portion. 2. In wed., regularity of pulse. Eusmilus (u-smi'lus), n. [NL., <Gr. cv, well, + 
Eurytoma (u-rit'o-ma), . [NL., < Gr. cvpvf, /_oc,poet'.foro-,(Aaf, the jaw.] Agenusoffos- 
broad, + TO/OJ, a cutting, a segment.] A genus gil sa b e r-toothed tigers, representing the cul- 
of hymenopterous insects, of the family Chalet- m i nat ion of the macheerodout dentition, having 
dido;, founded by Rossi in 1807. The wings are j n t ^e i ower j aw on iy f our incisors, a pair of 
small canines, one pair of premolars, and one 
P a * r f sectorial molars. The ramus of the jaw 
was g reatlv expanded to protect the enormous 
upper canines. 
Euspiza(u-spi'za),w, [NL. (Bonaparte, 1832), 
< Gr. TO, well, + oTrifa, anify a finch.] A ge- 
nus of North American buntings, of the family 
FringiUid(e, the type of which is the common 
black-throated bunting of the United States, 
E. americana. Also called Spiza. 
Euspongia (u-spon'ji-a), n. [NL., < Gr. rf, 
wefl, + mtoyyia, cnntyjof, a sponge: see sponge.'] 
The typical genus of fibrous sponges of the fam- 
ily Spongiidw, having a very elastic and homoge- 
neous framework throughout. It contains the 
ordinary bath-sponges, usually placed in Spon- 
gia. 
eusporangiate (u-spo-ran'ji-at), a. [< Gr. ei>, 
well, + NL. sporangium + -ate 1 .] Having 
sporangia formed from a group of epidermal 
cells, as in Ophioglossacece and Marattiacece. 
Compare leptosporangiate. 
perfectly hyaline ; the marginal vein is but slightly larger Eustachian (u-sta'ki-an), a. [< EmtacMliS + 
than the stigma) ; the posterior tibia; are nearly smooth; _ an Tn e proper name EustacJlius (> It. Evsta- 
Eurytoma frunicola. 
', male ; c, abdomen of female ; d t abdomen of male ; 
a, female ; . . . 
e, antenna of female ;/, antenna of 
sizes. ) 
nale. ( Hair-lines show natura 
the mesonotum is umbilicate-pnnctate ; and the claws are 
sharp. The species of this genus are especially parasitic 
upon gall-making insects. E. prunicola is bred from the 
oak-gall of Cyiiips quercus-prumts. 
Eurytomidae (u-ri-tom'i-de), . pi. [NL.,< 
Eurytoma + -idce.~]_ The Eurytonwnce regarded 
chio, Sp. Estaquio, Pg. Estaeio, F. Eustache, E. 
Eustace) (sometimes confused with Eustathius, 
of different origin : see Eustathian) is from Gr. 
svaraxvf, rich in corn, blooming, fruitful, < cv, 
j'sutyiviitu -T- -fruwj.j xuo jvit/(/n/*t/no jcgaiucu well, + a~axv, an ear of corn: see stachys.] 
as a family. Also Eurytomides. Walker; West- Pertaining to or named from Bartolomeo Eu- 
wood. 
Eurytominse (u'ri-to-mi'ne), n. pi. [NL., < 
Eurytoma + -ina;.] A subfamily of the para- 
sitic hymenopterous family Chalrididce, found- 
ed by Walker in 1832. It is distinguished by the very 
prominent snbqnadrate pronotum, the abdomen usually 
compressed from the sides and often highly arched, and 
by the incised joints and conspicuous whorls of hair of 
the antenna; in the male. The genus Isosoma of this 
group is not parasitic, but plant-feeding. 
Eusebian (u-se'bi-an), a. and n. [< Eusebius 
+ -an. The proper name Eusebius, Gr. TZvaefliof, 
means ' pious, godly,' < Gr. riwt/fr/f , pious, godly, 
< cv, well, + aifcadat, honor with pious awe, 
reverence, worship.] I. a. Of or pertaining 
to Eusebius of Nicomedia, an Arian bishop of 
Constantinople in the fourth century A. D. , or to 
his doctrines. 
II. n. A follower of Eusebius. See Arian 1 . 
Euselasia (u-se-la'si-a), n. [NL. (of. Gr. evac- 
Aaof, bright-shining), < Gr. cv, well, + o-c/laf, 
brightness.] A genus of butterflies, giving 
name to the Euselasiina!. Hiibner, 1816. 
Euselasiinae (u-se-la-si-l'ne), n. pi. [NL., < 
Euselasia + -inte.] A subfamily of eryciiiid but- 
terflies, containing over 70 species, in which the 
wings are usually abruptly truncate at the apex, 
with deep marginal sinuses. Also called Eury- 
Eusepii (u-se'pi-I), n. pi. [NL., < Gr. ev, well, 
+ ar/7ria, the cuttlefish.] A subfamily of sepi- 
oid cuttlefishes, containing the typical squids: 
same as the family Sepiidce. 
Euskara (us-ka'ra), . [Basque.] The native 
name of the Basque language. See Basque 1 . 
Euskarian (us-kar'i-an), a. [< Euskara + -inn.] 
Basque. See Euskara. 
Nor can we ever absolutely know that the Basques did 
not borrow their Euskarian dialect, as the French their 
Romanic dialect. 
Whitney, Life and Growth of Lang., p. 275. 
stachio, an Italian anatomist (died 1574) Eu- 
stachian canal. See canali. Eustachian tube, the 
tube leading from the middle ear to the pharynx. It is 
the communication between the cavity of the tympanum 
and that of the mouth. Morphologically, this tube is a 
part of the remains of the primitive visceral cleft of the 
embryo which places the mouth in direct communication 
with the exterior through the ear. Were it not for the 
membrane of the tympanum or ear-drum, which stops up 
the passage, there would be nothing to prevent the pas- 
sage of a sufficiently slender and flexible probe from the 
mouth through the Eustachian tube, tympanum, and ex- 
ternal meatus of the ear, and the passage would corre- 
spond to that of a twig or the finger into a fish's mouth 
and out through one of the gill-slits. In man the Eusta- 
chian tube is 1J to 2 inches long, directed downward, for- 
ward, and inward from the tympanum to the fauces. It 
is formed partly of bone, partly of gristly and fibrous tis- 
sue. The bony part, about half an inch long, is included in 
the temporal bone, between its squamosal and petrosal 
portions. The cartilaginous part is about an inch long, 
formed of a scroll-like piece of fibrocartilage, the interval 
between whose edges is completed by fibrous tissue. It 
is trumpet- or funnel-shaped, and ends by an oral orifice 
at the upper back part of the pharynx, a little to one 
side of the median line, and nearly opposite the middle 
meatus of the nose. The mucous membrane of the pha- 
rynx continues directly through the tube, and is covered 
with ciliated epithelium. See cut under ear. Eusta- 
chian valve, a semi-lunar membranous fold in the right 
auricle of the heart, between the mouth of the inferior 
vena cava and the auriculoventricular aperture, serving 
to direct the course of the blood. 
3ustatliian (u-stii'thi-an), a. and n. [< Eusta- 
thius + -an. The proper name Eustathius (> 
It. Kttstazio, F. Eustathe, G. Eustathius, etc.) 
(sometimes confused with Eimtiichiits, as above) 
is from Gr. ewraftfc, well-based, well-built, 
steady, stable, < t~v, well, + a-af>-, as in oraf?fpof, 
steady, firm, stable, < iardvai, set up, cause to 
stand: see stand, steady.] I. a. Of orpertain- 
ing to Eustathius. See II. 
II. a. 1. A member of the orthodox faction 
in Antioch in the fourth century A. p.. who ob- 
jected to the replacing of Eustathius, Bishop 
of Antioch, by an Arian. 2. A member of an 
