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GADINIID^. 



Genus LEPETA, Gray. 



Animal blind. 



Shell obovate, depressly-conical, surface with radiating 

 striae ; apex excentric, posterior ; aperture oval, muscular 

 impression horse-shoe-shaped, open anteriorly. 



Syn. Propilidium, Forbes and Hanley, Pilidium, 

 Midd., not Forbes. 



Ex. L. ceeca, Midler, pi. 52, fig. 7. Shell, L. caeca, 

 fig. 7, a. 



In this genus, which is established on the Patella cceca 

 of Miiller, the animal is deprived of eyes, the tentacles 

 are short and obtuse, and there is a single, central, rachi- 

 dian tooth on the lingual membrane. 



caeca, Mull. 

 Candida, Couth. 



Species of Lepeta. 



commoda, Midd. 

 rubella, Miill. 



Fam. GADINIID^. 



Head distinct, flattened ; tentacles expanded, funnel- 

 shaped ; eyes sessile. Gill single, placed obliquely across 

 the bacli of the neck. Foot, flat, thin, simple. 



Shell depressly-conical ; aperture with a siphonal 

 groove anteriorly on the right side. 



In this family the gill is single and cervical as in 

 Tecturid(B, but the tentacles are expanded and infundi- 

 buliform. The groove in the interior of the shell, for the 

 anal siphon, resembles that of Siphonaria, but the genera 



