378 TRICHOTROriDiE. 



Sub-gen. massyla, H. and A. Adams. 



Shell ovate, turbinate; spire obtuse, whorls transversely 

 striated ; aperture contracted and emargiuate anteriorly ; colu- 

 mella truncate. 



corrugata, Hinds. 



Genus ADMETE, Kroyer. 



Shell ovate, thin, covered with an epidermis ; spire 

 acute, last whorl ventricose ; aperture oval, channelled 

 anteriorly; columella with a few rudimentary folds ; outer 

 lip thin, simple, acute. 



Ex. A. viridula, Mailer, pi. 29, fig. 5. Shell, A. viri- 

 dula, fig. 5, a. 



The animal resembles that of Cancellaria, and there is 

 no operculum on the foot ; there are but a few species yet 

 known, though, doubtless, many remain to be discovered 

 in the Northern Seas, where the genus appears to repre- 

 sent Cancellaria, in the same manner that Trophon re- 

 presents Murex, and Bela certain species of Mangella. 



Species of Admete. 



abnormis, Gray. Couthouyi, Sow. 



arctica, Midd. viridula, Moll. 



Fam. TRICHOTROPID.E. 



Lingual membrane short and broad ; teeth in seven 

 series (SIS), the central hamate and denticulated, the 



