90 



above, smooth and polished beneath, without longitudinal (spiral) 

 sculpture ; spire conoidal, apex blunt, suture impressed ; whorl 6, 

 convex, rather closely wound, the last rounded at the periphery, 

 convex beneath ; aperture oblique, rather roundly lunate, broader 

 than high ; peristome thin, columellar margin oblique, rather 

 broadly reflected at the perforation. 



Major diam. 10, min. 9, height 6 mm. 



Hob. Darjiling. 



Distinguished by its shape, rather narrow whorls, and rugose 

 striatiou. 



[132. Macrochlamys ? perfragilis, Godwin-Austen (Nevill, MS.), 



MoL 2nd. ii, 1907, p. 161, pi. 109, fig. 5. 



Nairina ('Microcystis), n. sp. 5 (Sikhiin; coll. Dr. F. Stoliczka), 

 Nevilles Hand-list, no. 167, p. 39. 



Shell globose, scarcely perforate, thin membranaceous character ; 

 sculpture very minute, tine regular longitudinal stria3 ; colour 

 sapphire-green ; spire low, apex rounded and blunt ; suture very 

 shallow; whorls 4|, rounded on side, flat above; aperture broadly 

 lunate, vertical ; peristome very thin, columellar margin scarcely 

 thickened, sub vertical. 



Size : maj. diam. 7'0, min. 6'0, alt. axis 3*8 mm. 



Locality. Sikhim. 



This shell was sent as 167 A, as the type of perfragilis. There 

 should be four specimens left in the Calcutta Museum.] 



c. With a free caecum to male organ. 



[133. Macrochlamys richilaensis, Godwin-Austen, MoL Ind. ii, 

 1907, p. 154, pi. 105, figs. 1-1 g. 



Shell subdepressedly globose, very narrowly perforate, glassy 

 surface, very transparent; sculpture none, transversely crossed 

 by regular shallow close furrows ; colour greenish ochre ; spire 

 depressed ; suture shallow ; whorls 4, rather rapidly increasing, 

 showing at intervals 3 varices of progressional growth ; aperture 

 subvertical, widely lunate ; columellar margin subvertical, not 

 thickened and scarcely reflected. The aperture was covered with 

 a thick membranaceous epiphragm. 



Locality. Bichila Pass, Bhutan frontier (10,370 ft.). 



Size : raaj. diam. 18*75, min. 14*75, alt. axis 8'5 mm. 



The animal is dark green near the extremity of the foot. The 

 margin as well as the sole of the foot is pale ochre in the spirit, 

 probably ruddy ochre in life, quite a contrast to the upper part. 

 Sole of foot divided. As regards the general form, mucous gland, 

 and neck-lobes it is very like M. dalinyensis. The apical whorls 

 of the visceral sac are black, sparsely speckled with ochre : where 

 the membrane covering the heart and kidney commences this 

 colouring is reversed ; the ground is pale, openly speckled over 

 with ovate black markings and dots, with an undefined band of 



