Es. 
W OR M S. 
Lo 
Holothuria. Feelers or tentacula flefhy. 
Terebeila. Feelers or tentacula capillary. 
E. Mouth before: body furnifbed with arms. 
Triton. Arms 12, divided; fome of them cheliferous, 
Sepia. Arms 8-t1o, befet with fuckers. 
Clio. Arms 2, membranaccous, extended like wings, 
Oncbidium. Arms 2, dilated, placed at the fides of thé 
head. í 
Lobaria. Body above convex beneath flat, lobate. 
Lernea. Arms 2 or 3 each fide, round flender: 4 
caudal ovaries. 
Scyllea. Arms 6, each pair at a diftance. 
F. Mouth before: body furnifbed with peduncles or feet. 
Aphredita. Body oval, furnifhed with eyes: feelers 2 
{etaceous annulate. 
Amphitrite. Body proceeding from a tube and and annu- 
late: feelers feathered: eyes o, 
Sio. Body proceeding from a tube and articulate 
à fcelers 2, long fimple : eyes 2. 
Nereis. ^ Body long creeping, with lateral pencilled 
__ peduncles or feet : feelers fimple. 
Nais: Body long creeping: peduncles or feet with 
fimple briitles: feelers o: eyes 2 or o. 
G. Mouth placed beneath and generally central. 
Phyffophora. Body gelatinous, hanging by an air bubble, 
Medufa. Body gelatinous, fmooth. 
Lucernaria. Body gelatinous wrinkled and furnifhed 
with arms. 
Ajierias. Body coriaceous flat, generally radiate, and 
. muricate with papillz. : 
Echinus. — Body cruftaceous and covered with moveable. 
Ípines. 
HI. TESTACFA. WMollufca covered with a fhell, 
53 
54 
n Multivalves: fbells with many valves. a 
Cbiton. - Valves placed in tranfverfe plates down the 
back. 
Lepas. Valves unequal: body feflile. 
54, Phlaaj 
