74 STREPTAXIS. 



S. PETITI, Gould. PL 14, figs. 16-18. 



Narrowly umbilicate, thin, pellucid, greenish white, whorls 7, 

 closely ribbed-striate, the last smooth on the base, the penulti- 

 mate subangulate ; parietal lamina moderate, compressed, 

 entering; lip widely expanded, reflected, the margins sub- 

 parallel. Diam., 10 mill. Near Tavoy, Burmah. 



S. GLABER, Pfeiffer. PL 15, figs. 24-26. 



Narrowly nmbilicated, thin, pellucid, greenish white, smooth ; 

 whorls 6, suture white-margined ; parietal wall with a minute 

 tooth ; lip white, somewhat thickened, narrowly reflected. 



Diam., 8 mill. Demerara. 



S. DEFORMIS, Fer. PL 27, fig. 10. 



Narrowly umbilicated, thin, shining, pellucid, smooth, shining 

 white ; whorls 6, with deep suture ; parietal wall with a more or 

 less distinct minute tooth or thickening, near the junction of the 

 outer lip ; lip slightly expanded and shortly reflected. 



Diam., 7'5 mill. 



Venezuela, Surinam, Islands of Trinidad, 



and Barbadoes, W. I. 



This is too closely allied to the preceding species, and to the 

 edentulate S. Candeanus, Pfr. The three forms may need to be 

 united. 



S. PFEIFFERI, Zelebor. PL 14, fig. 13. 



Perforate, thinnish, white; whorls 6, with deep suture, shell 

 arcuately costulate above, smooth below, the last whorl obso- 

 letely angulated on the periphery ; a compressed lamina on the 

 parietal wall near the insertion of the lip ; lip narrowly reflected, 

 thinner and arcuate above. Diam., 9 mill. 



Camorta, Nicobar Islands. 



Unfigured Species. 



S. FORTUNEI, Pfeiffer. Shanghai, China. 



S. PORREOTUS, Pfeiffer. Laos Mountains, Cambodia. 



S. MAUGERI^E, Gray. Sierra Leone. 



S. SINUOSUS, Pfeiffer. Cochin China. 



S. SCHWEITZERI, Dohrn. Liberia. 



S. ERYTHROCEROS, Mollendorff. Southern China. 



