1892.] NATURAL SCIENCES OF PHILADELPHIA. 397 



Shell rather glassy, with many narrow whorls and thin, acute, 

 outer lip. 



Genus CYSTICOPSIS Morch. 

 Man. of Conch. (2) v. p. 5. 7. Proc. A. N. S. P. 1892, p. 214, pi. L3. 



Genitalia: 9 system without dart-sack or mucous glands; duct of 



the spermatheca very long, having a diverticulum ; uterus much 



distended, retaining the numerous young which are born living. 



$ system having a long flagellum upon the penis, and a glandular 



appendix which terminates in two long flagellum-like processes. 



Jaw vertically striated. Teeth normal. 



Shell thin, globose, the lip thin, acute, not expanded or reflexed. 



Foot short, wide. 



Distribution, Cuba and Jamaica. 



Group IV, EPIPHALLOPHORA. 



Genitalia : 9 system without accessory organs ; $ having the 

 penis continued into an epiphallus which generally bears a flagel- 

 lum. 



Jaw smooth (oxygnath), or ribbed (odontognath). 



The species of this group require much more investigation before 

 we shall be in a position to correctly classify them. Most of the 

 large, solid Helices of the tropics and the southern hemisphere 

 belong here. 



Tropical A m e r i ca n f c^racolus. 

 forms. t 



Cam^eneila. 



'A feathery glandular f q^j^^ 

 appendix on penis. \ 



f Chloritis. 

 Hadra. 

 sometimes degenerate. ' Planispira. 



Papuina. 



Australo-M o 1 u c c a n 



forms. ^ No appendix ; epiphallus 



Genus CARACOLUS (Montfort) Pilsbry. 



Genitalia : $ system lacking accessory appendages ; $ system 

 having the retractor muscle and a long epiphallus inserted at the 

 apex of the penis, the epiphallus continued as a short flagellum 

 beyond the insertion of the vas-deferens. Duct of spermatheca 

 long or short. 



Jaw either smooth or stoutly ribbed ; teeth normal. 



Distribution, West Indies and Northern South America. 



