ZOOTECUS. Ill 



ate, pellucid, whitish, delicately striate, apex conic, rather ob- 

 tuse, pellucid. Whorls 9 or 10, scarcely raised. Aperture 

 small, subrotund, semilunate ; lips somewhat thickened, 

 rounded. Length 8, diain. 2 1 /2 lines. Eastern India on the 

 banks of the Ganges, Dr. Royle. It varies greatly in size and 

 is often smaller" (Gray). 



Bulimus pullus GRAY, P. Z. S. 1834, p. 66. PFR., Monogr. 

 iv, p. 463 ; vi, p. 101. Rumina pulla GRAY, Ancey, Bull. Soc. 

 Mai. France iii, p. 61 (distribution). 



Bulimus adenensis Pfr., (pi. 26, fig. 30). Shell subper- 

 forate, subcylindric, solid, srnoothish, glossy; white, irregu- 

 larly strewn with grayish corneous spots. Spire long, taper- 

 ing above, the apex conic, rather acute, hyaline. Suture 

 light. Whorls 9, scarcely convex, the last about two-sevenths 

 the total length, subascending in front, rounded below. Aper- 

 ture vertical, subrhombic-semioval ; peristome unexpanded, 

 the margins joined by a thick callus, right margin obtuse, 

 columellar margin thick, dilated. Length 13, diam. 4.25, 

 aperture scarcely 4 mm. long, 2 wide (Pfr.). 



Arabia: on volcanic rocks at Aden (Benson, type loc.), 

 and on the island Dakulak in the Red Sea (Riippel). 



Bulimus adenensis PFR., Zeitschr. f . Malak. 1851, p. 27 ; 

 Conchyl. Cab. p. 78, pi. 21, f . 12, 13 ; Monographia iii, p. 404. 

 Pupa edentula RUPPEL mss. in Cuming Coll. 



Var. AGRENSIS Kurr (pi. 26, figs. 24, 25) comprises stouter, 

 white and chalky forms. B. cliion Pfr. (pi. 26, fig. 32) is 

 only a small form; while estellus Bens. (pi. 26, fig. 29) differs 

 in being still more robust. The figured specimen of cliion 

 (fig. 32) measures length 12, diam. 5.2 mm., whorls 



B. agrensis Kurr. (PI. 26, figs. 24, 25). Shell perforate, 

 cylindric-turrite, smooth, glossy, white; spire long, gradually 

 tapering above, the apex rather acute, suture impressed. 

 Whorls 9, a little convex, striate at the sutures, the last not 

 one-third the total length, somewhat ascending in front, 

 rounded basally. Aperture vertical, rounded-lunar; peris- 

 tome simple, unexpanded, the right margin lightly arcuate, 



