WORMS. 



41. 



43- 

 4H. 

 46. 



23. 



42. 



44. 



45- 



*5- 



a6. 



29. 



J3°- 



50. 



49. 

 48. 



51. 



52. 



Hohthuria. Feelers or tentacula flefhy. 

 Terebella. - Feelers or tentacula capillary. 



E. Mouth before: body furnijked with arms. 



Triton. Arms 12, divided; fome of them cheliferous. 



Sepia. Arms 8-10, befet with fuckers. 



Clio. Arms 2, membranaceous, extended like wings,* 



Onchidium. Arms 2, dilated, placed *t the fides of the 



head. 

 Lobar' a. Body above convex beneath flat, lobate. 



Lernaa. Arms 2 or 3 each fule, round flenden a 



caudal ovaries. 

 Scyll&a. Arms 6, each pair at a diflancc. 



F. Mouth before : body furnijhed with peduncles or feet. 



Aphrodita. 



Amphitrite. 



Spio, 



Nereis. 



Nais: 



Body oval, furnished with eyes: feelers 2 

 fetaceous annulate. 



Body proceeding from a tube and and annu- 

 late: feelers feathered : eyes o. 



Body proceeding from a tube and articulate; 



feelers 2, long fimple : eyes 2. 

 Body long creeping, with lateral pencilled 

 peduncles or fevt : feelers iimple. 



Body long creeping: peduncles or feet with 

 Iimple briltles : feelers o : eyes 2 or o. 



G. Mouth placed beneath and generally central. 



Phyjfophora. 



JVieduJa. 



Lucernaria. 



Ajlerias. 



Echinus. 



Body gelatinous, hanging by an air bubble. 

 Body gelatinous, fmooth. 

 Body gelatinous wrinkled and -fumifhed 



with arms. 

 Body coriaceous flat, generally radiate, znd 



muricate with papilla*. 

 Body cruiiaceo.us and covered whh moveable 

 fpines. 



III. TESTACEA. Mollufca covered with a jfhelL 



A. Multivalves : /hells with many valves. 



53. Chiton. 



54. Iff as. Valves unequal : body fefEIe. 



Valves placed in tr an fverfe plates down the 

 back. 



54* Flloas 



