154 LAND AND FKESHWATEE 



p. 49. no. 272. Nanhia (Bensonia ?), n. sp. The drawing bad 

 originally " luhrlca ? " written on it by Stoliczka ; subsequently 

 there was written in pencil on the opposite page by Nevill, " This 

 is not Macro. Iv.hiixi ? is it mainwarinr/i or an ally ? It is a species 

 of Hotala, vide 8tol.''* In Nevill's amended 'Hand-list,' which he 

 never lived to see published by the Calcutta Museum Trustees, and 

 which he left to my care shortly before his death, I find the name 

 " 7naimvarinr/iana '" inserted in ink to No, 272 in place of n, sp. in 

 the text. He had sent me also the type. 



Considerable doubt exists as to whether the animal of No. 21 of 

 Stoliczka, clearly without shell-lobes, can be associated with the 

 shell known to Nevill as mainwaringi or mainwaringiana. Until 

 we obtain this last shell and its animal in spirit, we cannot be 

 certain by any means to what subgenus it may belong. All 

 8toliczka's pencil notes made on the margins of the drawings were 

 carefully copied by me into the book in ink so far as they could be 

 deciphered, some having become very indistinct. All Nevill's notes 

 were made after the book was finally bound. In that year, 1877, 

 Nevill was receiving consignments of shells from Colonel Mainwaring, 

 who was up at Darjiling, and had collectors out in the neighbouring 

 hill country. 



Mackochlamys RiCHiLAENsis, n. sp. (Plate CV. figs. 1-1 g.) 



Locality. Richila Pass (10,370 ft.). 



Shell (figs. 1, 1 a) subdepressedly globose, very narrowly 

 perforate, glassy, 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 ; eolumellar margin subvertical, not 

 thickened and scarcely reflected. The aperture was covered with 

 a thick membranaceous epiphragm. 



Size: maj. 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 ueck-lobes it is veiT like M. dalingcnsis (Plate XXXV.). The 

 apical whorls of the visceral sac (Plate CV. fig. 1 b) ai'e black, sparsely 

 speckled with ochre : where i'm 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 same colour near the mantle-zone. A loop of 

 the intestine is defined in black. 



The jaw (fig. 1 d) has no central projection. 



The radula (figs. 1 e, If, 1 g) is nearly the same as in Dalingia 

 hhutaneiisis, only that the marginal teeth are much more evenlv 

 bicuspid : 



24 . 2 . 18 . 1 . 18 . 2 . 24 

 44 . 1 . 44 



