MOLLUSCA OF INDIA. 119 



depresso-conica, apice ohtuso, suturd leviter impressd, fascia rufd intus 

 tnarginatd. Anfr. 5|, lente accrescentes, ultimus peripJieria rotun- 

 datus, subtus modice convexus, apertararn versus vLv descendens. 

 Apertura late hmaris, obliqua, diagonalis ; peristoma tenue, intus 

 hand iacrassatum, margine hasali subrecto obtaso, columellari 

 refiexo. 



" Diam. maj, 19, miii. 17|, axis 9| mm. (ex ieoiie). In exemplo 

 minore diam. maj. 1!^|, min. 12|, axis Ih, mm. Apert. 7 lata, 

 6 oblique alta. 



'■'■ Hab. adMari (Murree) in montibus Himalayauis occidentalibus 

 inferioribus baud procul a fluvise Jhelum (^A. B. Wynne). 



" Var. major, depressa, anfractibus 6, spird convexd, parum 

 elevatd. 



"Diam. maj. 21|, min, 19, axis 10 mm. Apert. llg lata, 

 10 oblique alta. 



" Hab. etiam ad Mari. 



" SbeU perforate, subturbinately depressed, faintly striated, 

 polished, white, translucent, surrounded by a narrow rufous band 

 above the periphery. Spire depressedly conical, apex obtuse, suture 

 slightly impressed, and with a rufous margin inside. Whorls 5|, 

 increasing slowly and regularly, the last rounded at the periphery, 

 moderately convex beneath, scarcely descending towards the mouth. 

 Aperture broadly lunate, oblique, diagonal ; peristome thin, not 

 thickened inside, basal margin almost straight, columellar reflected. 

 (Dimensions as above.) 



" There is a larger variety, more depressed, with a spire convex 

 and six whorls. It may possibly be a distinguishable form, but I 

 think not. (Dimensions as above.) 



" I greatly question whether this form is really a Mucrochiamys, 

 and cannot help suggesting the possibility of its belonging to a 

 different subgeneric group, or even to Zonites. However, it is 

 associated at Mari with a true Maeroclilamys (31. p>rona, Nevill, 

 ' Scientific Results of the Second Yarkand Mission,' Mollusca, p. 17 j, 

 and two or three species of Helicarion ; so it is evident that a few 

 of these tropical types extend to this extreme north-western portion 

 of the Himalaya range, where, however, the majority of the Mollusca 

 consist of Bulirnini of the Petneus section. 



"• The specimen of M. ivynnei from which the accompanying 

 figure was taken has been mislaid or lost, and the description is 

 drawn up from a small individual. I have named the shell after 

 Mr. A. B. Wynne, of the Geological Survey of India, to whom I am 

 indebted for several Molhisca from the neighbourhood of Mari. I 

 have been in some doubt as to whether this might not be a form of 

 the shell described by Prof, v. Martens as Nanina jacquemonti 

 (Malak. Bl. xvi. 1869, p. 75 ; Pfr. Nov. Conch, iv. p. 48, pi. cxviii. 

 figs. 6-8) ; but, in the first place, it can scarcely, I think, be the 

 species figured by Jacquemont (Voyage dans I'lnde, Atlas, pi. xvi. 

 fig. 2), and, secondly, N. jacquemonti is described as having 'peri- 

 stoma obtusum, intus incrassatum, margine bascdl Iceviter 



arcuato,' none of which can apply to the present species. Pfeiff'er's 



PAET IX. M 



