AMALTHEA. 373 



Genus COCHLOLEPAS, Klein. 



Sole of foot with a crescentic muscular impression. 



Shell thick, obliquely conical ; apex posterior, non- 

 spiral ; muscular impression of the foot on a shelly plate 

 distinct from the substratum. 



Syn. Hipponyx, Defr. Cochlearia, Klein., not Linn. 

 or Munst. 



Ex. C. radiata, Quoy and Gaimard, pi. 41, fig. 3. 

 Shell, C. antiquata, Linnceiis, fig. 3, a, 3, h. 



This genus is known from Amalthea of Schumacher by 

 the distinct shelly base formed by the foot of the animal, 

 which leaves an impression of a horse-shoe shape, similar 

 to that of the mantle on the shell. The .species occur, 

 usually attached to living shells, in the Eastern Seas and 

 in Western America. 



Species of Cochlolepas. 



acuta, Quoy and Gaim. imbricata, Gould. 



antiquata, Linn. radiata, Quoy and Gaim. 



barbata, Sow. subrufa. Mart. 



foliacea, Quoy and Gaim. Ticaonica, Soiv. 



granulosa, A Adams. trigoua, Gmel. 



Genus amalthea, Schumacher. 



Buccal appendages moderate, slightly exserted ; sole of 

 foot with a crescentic muscular impression. 



Shell pointed, conical ; apex posterior, non-spiral ; 

 aperture wide, oval ; muscular impression of foot on the 

 substratum itself. 



Syn. Sabia, Gray. 



Ex\ A. australis, Quoy mid Gaimard, pi. 41, fig. 4. 



