CARINARIID^. 349 



FmoLA, Peron and Lesueur. 



/S'yn.— Pterotrachsea,, Forsk, Anops, d'Orb. 



Distr. — 14 sp. Atlantic, Mediterranean, Pacific. F. Quoyana^ 

 d'Orb. (Ixxxvi, 9t). 



Animal fusiform, elongated, with a long, slender, proboscidi- 

 form head ; fin narrowed at the base, usually furnished with a 

 small sucker ; tail elongated, keeled, sometimes pinnate ; nucleus 

 prominent; branchial processes numerous, conical, slender ; ten- 

 tacles XQYy short and conical ; eyes black and distinct, protected 

 by a rudimentary eyelid ; lingual ribbon oblong. The female 

 Firohe have a long moniliform oviduct. Anops Feronii, 

 d'Orbigny, described and figured as having no head (!), was 

 probably a mutilated Firola. " Such specimens are very 

 common, and seem just as lively as the rest." — Huxley. 



FiROLOiDES, Lesueur. (Cerophora, d'Orbigny.) Body cylin- 

 drical ; head tapering, furnished with two slender tentacles ; 

 nucleus at the posterior extremity of the body, with or without 

 small branchial filaments ; egg-tube regularly annulated ; tail- 

 fin small and slender, ventral fin with or without a sucker. 

 Distr. — 6 sp. Atlantic, Mediterranean. F. Gaimardi, Orb. 

 (Ixxxvi, 98). 



Family CARINARIID^. 



Animal with pedunculated nucleus, covered b}^ a glassj^ conical 

 shell, from the margin of which project the branchiae. Dentition 

 (xii, 42). 



Carinaria, Lam. 



Etym. — Carina^ a keel. Syn. — Tithyonia, Cavolini. 



Distr. — 8 sp. Tropical and subtropical seas. Fossil, 1 sp. 

 Miocene ; Turin. G. fragilis^ Bory (Ixxxvi, 99). G. vitrea\ 

 Lam. (Ixxxvi, 100). 



Shell h^^aline. symmetrical, limpet-shaped, with a posterior, 

 subspiral apex and a fimbriated dorsal keel ; nucleus minute, 

 dextrally spiral. 



Animal (Ixxxvi, 99) large, translucent, granulated ; head thick, 

 cylindrical ; lingual ribbon triangular, teeth increasing rapidly in 

 size, from the front backwards ; tentacles long and slender, eyes 

 near their base ; ventral fin rounded, broadly attached, with a 

 small marginal sucker; tail large, laterally compressed; nucleus 

 pedunculated, covered by the shell, gills numerous, pinnate, 

 projecting from beneath the shell. 



They feed on small Acalephse, and probably on the Pteropoda ; 

 Mr. Wilton found in the stomach of a Carinaria two fragments 

 of quartz rock, weighing together nearly three grains. The 

 sucker on the fin of this and the preceding genus was formerly 

 supposed to be characteristic of the male, but it has recently 

 been found well-developed on female individuals. Mr. Arthur 



