104 ZOOTECUS. 



peristome unexpanded, very thin, margins unequal, hardly 

 connected, the outer very thin and fragile, columellar short, 

 slightly arcuate, very delicately filiform-thickened. Length 

 14, diam. of penult, whorl 4.25, alt. apert. 4 mm. (Kob.). 



Turkestan: Aulie-ata, in the Syr-Darja district (coll. 

 Rosen). 



Stenogyra retteri Rosen mss. KOBELT, Nachrbl. d. Deutschen. 

 Malak. Ges. xxxvi, p. 87, June, 1894; and in Rossmassler's 

 Iconographie xii, p. 11, pi. 305, f. 1953. 



The first true Stenogyrid from Turkestan. Only one ex- 

 ample. It appears adult, but perhaps the peristome is not 

 completely developed (Kobelt). 



While the generic position of this snail is not certain, yet 

 its characters indicate, I think, a place in Obeliscella. 



Genus ZOOTECUS Westerlund. 



Zootecus WESTERL., Fauna der in der Palaarctisehen Re- 

 gion lebenden Binnen-Conchylien, iii, pp. 3, 75, 1887 (for 

 B. insularis, adenensis, ducoureti, soleilleti) . Mastus, Buli- 

 mus, Rumina and Buliminus in part of authors. Chilogym- 

 nus JOUSSEAUME, Bull. Soc. Zool. France, vii, 1894, p. 289 

 (for C. insularis Ehr.). 



Shell rather small, pale or white, perforate, pupiform, cy- 

 lindric with conic summit or cylindric-tapering, composed of 

 7 to 10 compactly coiled whorls, the last rounded below; 

 striate or decussate, glossy. Summit conic, entire, the pro- 

 toconch striate like the following whorls, not bulbous. Axis 

 slender and straight, narrowly perforated throughout. Aper- 

 ture small, widely ovate, the peristome thickened, "blunt, 

 columellar margin straight or concave, with reflexed edge, 

 continuous with the basal lip. Reproduction viviparous. 

 Dentition Achatinoid. Type Z. insularis (Ehr.). 



Distribution: Cape Verde Is. and the Sahara eastward to 

 Arabia, India and Burma, chiefly in arid or barren regions. 



A group of small, Pupiform snails, largely eremitic in 

 habits, generally occurring in large numbers, and varying 

 within wide limits in size and degree of taper. Most gath- 

 erings from one place show shorter and longer individuals, 



