164 BULIMINiE. 



Genus CHONDRUS, Cuvier. 



Shell rimate-ovate, oblong ; apex acuminated, whorls 

 7 9, the last nearly equal to -J of the length ; aperture 

 semi-oval, iuternally generally contracted; peristome labiate, 

 or furnished with numerous teeth, or, very rarely, simple, 

 sometimes the apertural paries is uni-dentate at the external 

 angle. 



Syn. Gonodon, Held. Chondrula, Beck. Jaminia, 

 Leach. 



Ex. C. pupa, Linnceus, pi. 75, fig. 9. 



Middle and Southern Europe, and the shores of the 

 Mediterranean and its islands, constitute the chief localities 

 of this genus. 



Species of Choudrus. 



acus, Pfeiff. Parreysii, Pfeiff. 



Bergeri, Both. pupa, Linn. 



denticulatus, Pfeiff. quadridens, Mull, 



Eleoicus, Reeve. quinquedentatus, Miihlf. 



Lawii, Phil. Kossmassleri, Pfeiff. 



leucodon, Pfeiff. seductilus, Ziegl. 



microtragus, Parr. septenidentatus, Roth. 



olivaceus, Pfeiff. tridens, Mull. 



Sub-gen. mastus, Beck (Cylindrus Fitz., not Breyn. or 

 Boanni). 



Shell sub-perforate, cylindrical ; apex obtuse, whorls numer- 

 ous ; columella short, straight ; peristome internally labiate, a 

 little expanded. 



Adenensis, Pfeiff. Caraccasensis, Reeve. 



Burcbelli, Gray. granum, Pfeiff. 



