STREPTAXIS. 71 



smaller than S. Enneoides, Martens, not perforate, smooth, and 

 has more convex whorls. 



Unfigured and Undetermined Species. 



S. GIBBOSUS, Pfr. New Granada. 



S. DENTICULATUS, Dohrn. (Suture denticulate). 



Mombasa, E. Africa. 



S. KIRKII, Dohrn. Island in Lake Nyassa. 



S. EPISTYLIUM, Miiller. Guinea (Morch). 



This species was for a long time considered one of the group 

 called Sagda, so characteristic of Jamaica. Morch (Jour, de 

 Conch., xxiv, 374) says that the type has been found, and that 

 it is a Streptaxis. The figure in Lister is unrecognizable. 



Subsection II. Dente parietali munitae. 



S. OVATUS, Pfeiffer. PL 14, figs. 92, 93. 



Perforate, pellucid, greenish white ; whorls 6^, closely striate 

 above ; parietal wall with a lamelliform tooth, lip white, slightly 



expanded. Diam., 16 mill. 



Habitat unknown. 



S. DEPLEXUS, Souleyet. PL 14, figs. 95, 96. 



Shell narrowly umbilicated, whitish, arcuately striated above, 

 smooth below ; whorls 6, with deep suture ; aperture with a 

 lamellar parietal tooth, peristome expanded-reflected. 



Diam., 18 mill. 



Touranne, Cochin China. 



S. SOLIDULUS, Stoliczka. PL 14, fig. 99. 



Moderately umbilicated, solid, white ; whorls 7, flexuosety 

 costulate above, smoothish below, suture simple, impressed ; 

 parietal wall with a strong tooth, lip planately reflected. 



Diam., 12 mill. 



Moulmein, Barmah. 



S. PELLUCENS, Pfeiffer. PL 14, figs. 98, 100. 



Narrowly umbilicated, thin, shining, hyaline, suture impressed, 

 submarginate ; whorls 6^, arcuately ribbed-striate, becoming 



