MOLLUSCA 0^ INDIA. Jo / 



Macgregor, the oflicer who commanded the escort to my Survey 

 Party on the expedition into the Daila country. 



The two shells mentioned above have been sent me for deter- 

 mination from the Indian Museum, and prove to be the same as 

 the single type-specimen in my collection, They are far finer, 

 better grown specimens, with crenulated outer lower margin, 

 showing well, with three well-marked folds only just indicated in 

 my drawing. They are also slightly larger, maj. diam. 7' 25 mm. 



Altc^tjs mutattjs, G.-A. (Plate CXLY. figs. 9, 9 a.) Type 

 No. 2495 (ToruputuPeak) B.M.Coll. 



A. mutatus, G.-A., J. A. S. B. 1876, vol. xlv. pt. 2, p. 177, pi. vii. 

 figs. 11, 11 «. 



Original descripton : — " Shell sub-turbinately depressed, openly 

 umbilicated, fragile, covered with a scabrous dull ochreous epidermis, 

 which peels off in old shells, very regularly and strongly striated 

 throughout, the ribbing on the last whorl very fine. Spire sub- 

 conoid, apex rather blunt, suture deeply impressed. Whorls 4, 

 rounded, the last swollen, moderately constricted, then again 

 expanded and crossed by two ridges, the last of these not extending 

 all round the whorl. The constriction very regularly ribbed. 

 Sutural tube short, thickened at the base. Aperture oblique, 

 circular. Peristome double but closely united, very slightly 

 reflected. Operculum multispiral, the edges of the outer whorls iu 

 high relief so as to form a deep cup-like hollow in the centre. 



"Alt. O'lU, major diam. 0-20, sutural tube 0*055 in. 



'■'■ Hah. On Toriiputu, Tiiuir, and Shengohr Peaks, and the Ye'tay 

 Ravine, Dikrang Valley (No. 2652 P.M. Coll.) at 6-7000 feet 

 elevation; in the dead leaves and moss about the roots of the forest 

 trees I found about a dozen. The ground at the time was covered 

 with snow, so that it was very cold work liunting for them. 



"This shell is an interesting ally of A. JcJiasiacus, from which it 

 differs in its thick, well-ribbed epidermis, but more especially in 

 the very different form of the operculum, wliich in Jchasiacus is 

 quite smooth and concave in front. It is also a smaller and more 

 delicately formed shell." 



I have a specimen from the Yetay Pavine, No. 2652, figured in 

 Plate CLYII.fig. 8 for comparison with a species fromtlieAbor Hills, 

 which is far larger but has the double ridge behind the aperture. 



ATYCiEtrs MUNDULUS, n, sp. (Plate CXLIX. fig. 8.) Type 

 No. 955 P.M. 



Localitif. Toruputu, Dafla Hills {Godwin- Austen). 



Shell globosely conoid, umbilicated ; sculpture rather strong, 

 regular costulation on the upper whorls, conspicuous, as next the 

 suture it is peculiarly fine and regular; colour white ; spire high, 

 about half the diameter, apes fine ; suture impressed, the sutural 

 tube moderately long ; whorls 4, well rounded, constriction slight 



