339 
HELMINTHOLOGY. 
male armed with two hooks inclofed 
in a pellucid veiicle.—In the badger 
and fox. 
Filaria. - - Body entirely filiform.—The dracuncu- 
lus, or Guinea worm. 
Scolex. - - Body minute, gelatinous, opake ; head 
exfertile and retractile^ with four pel¬ 
lucid auricles.—In the lophius. 
Ligula. - - Body linear, equal, and long.—Common 
in fith. 
Liimuatula. - Body deprefled, oblong ; mouth placed 
on the fore-part, and furrounded with 
four paffage's.—In the hare. 
Strongylus. - Body round, long ; the fore-part globu¬ 
lar and truncate, with a circular aper¬ 
ture fringed at the margin ; hind-part 
of the female pointed, of the male 
hooded.—In horfes and fheep. 
Echynorhynchus. Body round ; probofcis cylindrical, re¬ 
tractile, and crowned with hooked 
prickles.—In man, horfes, fwine, birds, 
fifii, and reptiles. 
Hseruca. - - Body round ; head crowned with prickles. 
In mice. 
Cuculldnus. Body pointed behind ; the fore-part ob- 
tufe, with an orbicular mouth.—In 
the mole, birds, and fith. 
Caryophyllaeus. Body round, fmooth, with a large di¬ 
lated mouth.—In carp and tench. 
Fafciola. - - Body deprefled, ovate, with a terminal 
and lateral pore.—The gourd-worm 
or fluke, which produces the rot in 
theep. 
Taenia. - - Body flat, jointed ; head with four ori¬ 
fices for fuCtion.—The tape-worm, and 
hydatids, fo common .in the human 
fubjeCt. 
Furia. - - Body linear and ciliate on each fide, with 
reflected prickles.—B urrows under the 
fkin. 
2. Not inhabiting the bodies of other animals ; and without the 
lateral pore. 
Gordius. - Body equal, filiform, round, and fmooth. 
—The hair-worm, found in ftagnant 
waters, old wooden pipes, &c. 
Hirudo. - - Body truncate at each extremity; head 
and tail dilated when in motion.—The 
leech. 
3. Perforated, with a lateral pore. 
Lumbricus. - Body round, annulate, furnifhed with 
mmiite concealed prickles.—The com¬ 
mon earth-worm. 
Sipunculus. Body round ; mouth cylindrical and nar¬ 
rower than the head.— The tube-worm. 
Planaria. - - Body deprefled, with a ventral pore.— 
Found in waters, wet meadows, &c. 
II. Mollusca. Simple naked animals, furnifhed 
with limbs. 
i. Mouth placed above. 
Aftinia. - Body fixed, with a Angle terminal dila¬ 
table aperture, furrounded by tenta¬ 
cula or cirri.—The fea-marygold, ane¬ 
mone, & c. 
Clava. - - Body fixed, with a Angle dil table verti¬ 
cal aperture, furrounded with clavate 
tentacula.—On pici, and fltells. 
Pedicellaria. Body fixed, and furniihed with a rigid 
peduncle.-—Found on the Echinus. 
Mammaria. - Body loofe, fmooth, with a Angle aper¬ 
ture without cirri.—Found intheocean. 
Afcidia, - - Body fixed, with two apertures, one of 
which is terminal, the other placed'a 
little beneath,—The fea-flalk. 
Salpa. - - Body loofe, with two apertures, one at 
each end.—Found in the Archipelago, 
Mediterranean, See. 
Dagyfa. - - Body loofe, angular, open at each end.—» 
Found in the Spanifn feas. - 
2. Mouth placed before. 
Pterotrachea. Body pervious, gelatinous, with a move- 
able fin at the head or tail.—Found in 
the Mediterranean. 
Derris. - - Body round., tapering, articulate; feel¬ 
ers two.—On the coaft of Pembroke- 
fhire. 
3. Mouth placed before ; body with a lateral perforation. 
Limax. - - Feelers four; vent common with the 
lateral pore—The flug. 
Laplyfia. - - Feelers four; vent placed above the 
lower extremity.—The fea-hare. 
Doris. - . Feelers two ; vent above the lower ex¬ 
tremities.—Found in moft feas. 
Tethys. - - Body with two fmall pores on the left 
fide.—In the Adriatic Sea. 
4. Mouth before ; body furrounded with feelers on the fore-part. 
Holothuria, Feelers or tentacula flefhy.—A beautiful 
fpecies ; inhabiting all feas. 
Terebella. - Feelers or tentacula capillary.—Thefhip- 
borer. 
5. Mouth before ; body furnifhed with arms. 
Triton. - - Arms twelve, divided; fome of them 
cheliferous.—On the Italian fhores. 
Sepia. - - Arms eight to ten, befet with fuckers.— 
The cuttle-fifh. 
Clio. - - Arms two, membranaceous, extended like 
wings.—American Ocean, and North 
Sea. 
Onchidium. - Arms two, dilated, placed at the fides 
of the head. Found in Bengal. 
Lobaria. - Body above convex, beneath flat, lobate. 
—In the North Sea. 
Lerntea. - - Arms two or three each fide, round, flen- 
der ; two caudal ovaries.—Found on 
the gills of fifh. 
Scylltea. - - Arms fix, each pair at a dillance.—In 
the Red Sea. 
6. Mouth before ; body furnifhed with peduncles or feet. 
Aphrodita. - Body oval, furnifhed with eyes; feelers 
two, fetaceous, annulate.—In the Eu- 
.ropean leas. 
Amphitrite. Body proceeding from a tube, and annu- 
late ; feelers feathered.—Inhabits all 
the Ocean. 
Spio. - - - Body proceeding from a tube, and articu¬ 
late ; feelers two, long, Ample; eyes 
two.—Greenland feas. 
Nereis. - - Body long, creeping, with lateral pen- 
cilled peduncles or feet ; feelers Am¬ 
ple.—In every fea. 
Nais. ... Body long, creeping ; peduncles or feet 
with Ample bridles; eyes two.—Found 
in dagnant waters. 
7 Mouth placed beneath, and generally central : 
Phyflophora. Body gelatinous, hanging by an air-bub- 
bie.—in the Mediterranean. 
Medufa.- - Body gelatinous, lmooth.—Called the 
lea-nettle ; and found in every part of 
the Ocean. 
Lucernaria. Body gelatinous, wrinkled, and furnifhed 
witli arms.—In the Greenland feas. 
Aflerias. - - Body coriaceous, flat, generally radiate, 
and muricate with papilla.—The fea- 
ftar. 
Echinus. - - Body Crudaceous, and covered with 
moveable fpines,—’The fea-urchin. 
III. Testacea. 
