GASTEROPODA-. 



Cabinaria, Lamarck. 



343 



Etymology, carina, a keel (or keeled vessel). 



Type, C. cymbium, Desh. = C. cristatus, L., Fig. 141, PI. 

 XIY., Fig. 19. 



Sliell hyaline, symmetrical, limpet-sliaped, "witL. a posterior 

 sub-spiral apex and a fimbriated dorsal keel • nucleus minute, 

 dextrally spiral. 



Animal large, translucent, granulated; bead tbick, cylin- 

 drical; lingual ribbon triangular, teetb increasing rapidly in 

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

 near tbeir base; ventral fin rounded, broadly attacked, with a 

 small marginal sucker ; tail large, laterally compressed ; nucleus 

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

 projecting from beneath the shell. 



Distribution, 8 species. Mediterranean and -warmer parts of 

 the Atlantic and Indian Oceans. They feed on small Acalephce, 

 and probably on the pteropoda ; Mr. Wilton found in the 

 stomach of a Carinaria two fragments of quartz rock, weighing 

 together nearly 3 grains. 



Fossil, 1 species. Miocene. Turin. 



Cardiapoda, D'Orbigny. 



Example, 0. placenta, PI. XIY., Fig. 20. 

 Etymology, cardia, heart, pons, foot. 

 Synonym, Carinaroides, Eyd. and Souleyet. 

 Animal like Carinaria. 

 Distribution, 5 species. Atlantic. 



Shell minute, cartilaginous ; peristome expanded and bi-lobed 

 in front, enveloping the spire behind. 



Family II. — Atlantid^. 

 Animal furnished with a well-developed shell, into which it 



* Fig. HI. f , proboscis ; t, tentacles ; 6, bvanchite ; s, shell ; /, foot ; d, disc. 



