LUCAPINA. 



447 



Genus LUCAPINA, Gray. 



Mantle-margin fimbriated, reflexed more or less over 

 the edges of the shell. 



Shell oblong, oval, depressly conical, surface cancel- 

 lated ; apex sub-central, with an oval perforation ; aperture 

 expanded, the margin crenulated ; perforation surrounded 

 by a callus, truncated posteriorly, and sometimes produced 

 into a transverse lamella. 



Ex. L. reticulata, Donovan, pi. 51, fig. 2. Shell, L. 

 crenulata, Sowerby, fig. 2, a . 



This genus includes all those reticulated and cancel- 

 lated forms, generally referred to Fissurella, which have 

 the margin of the aperture crenulated, and in which the 

 perforation, internally, is transversely truncate and some- 

 times slightly concamerated. 



Species of Lucapina. 



aegis, Eeeve. 

 alta, C. B. Adams. 

 alternata, Soy. 

 aspera, Soiv. 

 australis, Krauss. 

 Benguelensis, Dkr. 

 calvculata, Sow. 

 caucellata, Soland. 

 Candida, Soiv. 

 Cayenriensis, Lam. 

 crenulata, Sow. 

 cruciata, Krauss. 

 cyathulum, Reeve. 

 deusiclathrata, Reeve. 

 digitale, Reeve. 

 Dysoni, Reeve. 



elongata, Phil. 

 excelsa, Adams and Reeve 

 fimbriata, Reeve. 

 fumata. Reeve. 

 fuuiculata, Reeve. 

 gemmulata, Reeve 

 gibberula, Lam. 

 inaequalis, Sow. 

 lucei, Reeve. 

 indusica, Reeve. 

 Jukesii, Reeve. 

 larva, Reeve. 

 lentiginosa, Reeve 

 Lincolni, Gray. 

 Menkeana, Dkr. 

 Metcalfii, Reeve. 



