282 Quarterly Journal of Conchology. 



Rather diffused around Zanzibar, but not common ; usually 

 under stones. A number were found by Mr. Gibbons in the in- 

 terstices of a small piece of coral, lying on the ground under a 

 tree ; a few yards away great quantities of dead and old shells 

 were lying among the grass, near some bushes. 



In March this species contains 3 or 4 large calcareous shelled 



per OS 



Builminus cinereus, Gibbons, MS. (PI. III., fig. 5). 

 Shell conical, tapering, rather thin, of a light brown color, faintly 

 striulate transversely; epidermis thin and distinct; zvhorls 73^, 

 convex, inflected towards suture, gradually enlarging to last, 

 which is rounded and one-third the length of the shell, spire 

 produced, tapering ; apex rather acute ; suture deep and very 

 , distinct ; nioidJi ovato-trigonal, slightly pointed in front, sub- 

 angulate behind ; peristome thin and direct ; inner lip slightly 

 reflected ; uinbilicus distinct, moderately deep. 



Length 0.25, breadth 0.105. 

 Hab. Zanzibar. 



One dead specimen of this species was found at Zanzibar. 



Subuiina intermedia, Gibbons, MS. (PL III., fig. 4). 

 Animal with body less than one-half the length of the shell, 

 narrow and high, dorsum rounded ; tail sloping and abruptly 

 pointed ; color a pearly white ; upper tentacles very short and 

 also white; tipped with faint brownish; A77crr almost obsolete. 



Shell elongated, veiy slender, conico-cylindrical, very thin, glossy 

 semi-transparent, of a glassy straw color, very finely striolate in 

 the line of grov.-th ; epidermis very th.in ; wliorls 8-8 J.^, very 

 oblique, convex, gradually tapering to apex, which is obtuse and 

 abrupt ; the last vrhorl is but little larger than the penultimate ; 

 suture very oblique^ deep ; mouth broadly ovate ; outer lip thin 



