72 STREPTAXIS. 



smooth on the body-whorl ; parietal lamella small, compressed, 

 lip somewhat thickened and reflected, thinner and arcuate above. 



Diam., 13 mill. 



Laos Mountains, Cambodia. 



Var. ft (PL 14, fig. 100), is described by Morelet as " Larger, 

 more oblique and thinner than the type." 



S. MICHAUI, Crosse and Fischer. PL 14, figs. 7, 8. 



Umbilicus impervious, shell solid, opaque, grayish white; 

 whorls 6-J, closely arcuately ribbed-striate ; parietal tooth lingui- 

 form ; lip thickened, reflected, its extremities joined by a shining 

 callus. s Diam. 8, alt. 11 '6 mill. 



Isl. Poulo Condor, Cochin China. 



This Is one of the species of Mr. Ancey's group Oophana. 



S. EXACUTUS, Gould. PI. 14, figs. 11,12. 



Widely umbilicate, thin, semidiaphanous, white ; whorls 6, 

 closely lirate-striate above, last whorl smooth below ; suture 

 deep ; parietal wall with a strong laminar and an inconspicuous 

 second tooth ; lip white, reflected, narrower and sinuated above. 



Diam., 13 mill. 



Burmah. 

 S. SANKEYI, Benson. PL 14, figs. 2, 3. 



Obliquely umbilicated, white; whorls 7, the earlier ones sub- 

 planate, the antepenultimate rather acutely carinated at the 

 periphery, the last two deviating, and compressed around the 

 umbilicus ; closely costulately striate ; parietal wall with a 

 prominent entering lamella; peristome expanded, reflected, 

 narrower and sinuated above. Diam., 10 mill. 



Moulmein, Burmah. 

 S. HANLEYANUS, Stoliczka. PL 14, figs. 9, 10. 



Rather widely profoundty umbilicated, grayish white ; whorls 

 6J, filiformly striate above and below, base subangularly convex ; 

 first whorls flattened, antepenultimate acutely carinate, balance 

 deflected, rounded ; parietal wall with entering lamina ; lip 

 reflected, sinuated above. Diam., 7*5 mill. 



Moulmein, Burmah. 



Too close to the preceding species ; from which it is said to 

 be distinguished by its smaller size, more depressed form, larger 

 umbilicus, and longer and more regularly rectangular aperture. 



