LEPTOCONUS. 



251 



Genus LEPTOCONUS, Swaiuson. 



Shell conical, sometimes striated ; spire acute, con- 

 cave, whorls numerous, the basal whorl deeply notched at 

 the suture ; aperture narrow, slightly effuse at the fore part. 



Ex. L. raphanus, Hwass, pi. 26, fig. 4. Operculum, 

 L. capitaneus, Linnceus, fig. 4, a, 4, h. Shell, L. Amadis, 

 Chemnitz, fig. 4, c. 



M. Quoy observes, speaking of L. miles, that the foot 

 is very narrow and the operculum longer than usual, and 

 that the tentacles are slender and the veil pointed at 

 the extremity. The species are extremely numerous, and 

 will probably require further subdivision when more of 

 the animals shall have been made known. 



Species of Leptoconus. 



aculeiformis, Reeve. 

 acutaugulus, Chem. 

 Amadis, Chem. 

 amrairalis, Linn. 

 archon, Brod. 

 arcuatus, Brod. 

 atteuuatus, Reeve. 

 Bovneensis,Adams and Reeve. 

 caucellatus, Brug. 

 cassis, Meusch. 

 cingulatus, Lam. 

 Clerii, Reeve. 

 commodus, A. Adams. 

 Delessertianus, Recluz. 

 dispar. Sow. 

 ecliinulatus, Kien. 

 emarginatus, Reeve. 

 eximius. Reeve. 



flavescens. Gray. 

 floridulus, Adams and Reeve. 

 gi'adatus, Gray. 

 iucurvus, Sow. 

 insculptus, Kien. 

 L'Argilliertii, Kien. 

 lemmiscatus, Reeve. 

 leutiginosus, Reeve. 

 leoniuus, Hwass. 

 Lorenzianus, Chem. 

 luctificus, Reeve. 

 marchionatus, Hinds. 

 minutus, Reeve. 

 monilifer, Brod. 

 Narcissus, Lam. 

 nobilis, Linn. 

 ochraceus, Lam. 

 Ovhignyi, Ardouin . 



