102 ZONITID^E. 



146. Macrochlamys hepatizon, Godwin- Austen, Mol Ind. i, 1888, 



p. 209, pi. 53, figs. 3, 4 (shell). 



Shell perforate, depressed, discoidal, solid, smooth, faintly 

 striated transversely, slightly polished, yellowish brown; spire 

 flat, suture moderately impressed; whorls 5, rather closely wound, 

 the last rounded at the periphery, flatly convex beneath ; aperture 

 oblique, lunate ; peristome thickened within on basal margin, 

 which is arcuate, columellar margin sinuate, vertical for a short 

 distance above and broadly reflected. 



Major diam. 14, min. 12|, height 5 mm. 



Hab. Hills north and south of Assam Valley ; Toruputu Peak, 

 Dafla Hills ; Habiang Garo Hills (Gochvin- Austen). 



This form closely resembles M. ? consepta from Burma, but the 

 whorls are fewer, the size smaller, and the colour different. 



147. Macrochlamys lata, Godwin-Austen, Mol. Ind. i, 1888, p. 209. 



pi. 53, fig. 8. 



Similar to M. liepatizon, but smaller, milky-white or grey in 

 colour : the spire slightly higher and the aperture more oblique, 

 with its upper margin sloping outwards and downwards, not 

 horizontal. 



Major diam. 9, min. 8*5, height 3*4 mm. 



Hab. Teria Ghat, Khasi Hills (Godwin- Austen). 



b. Not labiate. 



148. Macrochlamys decussata, Bs. (Nanina) J. A. S. B. v, 1836, 

 p. 330; Pfr. (Helix) Mon. Hel. i, 1847, p. 70; id. t. c. iii, 

 1853, p. 62; H. $ T. (Helix) C. I. 1876, pi. 112, figs. 1, 2, 3; 

 Godwin- Austen, Mol. Ind. i, 1883, pi. 19, fig. 6 (animals in coitu), 

 pi. 21, fig. 15 (shell-sculpture) (1883). 



Shell perforate, depressed, thin, smooth and silky above, 

 polished beneath, under the microscope decussated above with 

 slightly flexuous transverse strite and fine impressed lirate longi- 

 tudinal lines, radiately and concentrically striated below, fulvous 

 horny ; spire but little raised, suture slightly impressed ; whorls 

 6-7, slightly convex, regularly increasing, the last subangulate at 

 the periphery in small specimens, rounded in larger shells, base 

 moderately swollen ; aperture slightly oblique, lunate ; peristome 

 thin, simple, upper margin nearly straight, basal subarcuate, 

 columellar inclined, briefly reflexed at the perforation. 



Major diam. 31, min. 27, height 13 mm. 



Hab. Khasi Hills, common at Cherra Punji. 



The type, measuring 25 mm. in major diameter, was subangulate 

 at the periphery and possibly immature. 



[The animal has a very long right shell-lobe which can be 

 extended to the apex of the shell, the left is far shorter.] 



