PRESTON': MOLLUSCA FROM N.W. CHINA. 13 



the last whorl painted with a very narrow, whitish spiral streak at the 

 periphery ; whorls 6|, the apical whorls small, the last two very 

 broad, the last ascending in front, rather flat, marked with lines of 

 growth ; suture impressed, narrowly margined below ; columella 

 descending obliquely; labriira white, thin, expanded, hardly reflexed, 



the margins joined by an almost imperceptible callus; aperture very 

 large for the size of the shell, broadly inversely auriform ; interior of 

 sliell reddish, polished, shining. Alt. 22-75 mm. ; diam. maj. lO-o, 

 min. 7'5 mm. Aperture: alt. 9, diam. 5mm. 



Hah. — Limestone region, S.E. Kan-sii, at an altitude of 3,000 feet. 



Easily distinguished fiom otlier forms from this region by the 

 exceptionally large aperture. 



BuLiMiNDS Waedi, n.sp. 

 Shell fusiform, with rather acuminate apex, rimate, dark flesh- 

 colour, obliquely transversely banded, and occasionally blotched with 

 white ; whorls 7, moderately convex, the later whorls rather rapidly 

 increasing, marked with fiTie growtli-strise ; suture well impressed, 



narrowly margined with white below ; perforation reduced to a mere 

 chink ; labrum white, expanded, not reflexed, the margins joined by 

 a light callus; aperture irregularly ovate. Alt. 15*5 mm.; diam. maj. 

 6-75, min. 5-5 mm. Aperture : alt. 4, diam. 3 mm. 



Hal. — Mountains of S.E. Kan-su, :it an altitude of from 2,000 to 

 5,000 feet. 



BuLiMiNus (Serinus) sobrinus, n.sp. 



Shell cylindrically fusiform, pale flesh-colour, mottled and banded 

 here and therewith a darker shade of the same colour; whorls 11, 

 somewhat convex, regularly and rather slowly increasing, malleated. 

 occasionally almost sub-costulate, the last ascending in front, and 

 somewhat dilated below, just behind the aperture; suture impressed, 

 margined below ; umbilical area forming a shallow, elongate 



