MACROCHLAMYS. 97 



Nanina vitrinoides, Bs. J. A. 8. B. v, 1836, p. 350; Pfr. (Helix) 

 Mm. Htl. in, 1853, p. 62, pt. ; id. t. c. vii, 1876, p. 108, pt. : nee 

 Desliayes. 



Shell very similar to that of M. indica^ but broader in propor- 

 tion to the beight, the spire lower, and the lower surface more 

 excavated around the perforation, which is larger. The mouth 

 is decidedly broader in proportion to its height ; as a rule, too, 

 the size is larger and the surface is more polished. Longitudinal 

 sculpture faint and often obsolete ; when visible it resembles that 

 of M. indica. 



Major diam. 21, inin. 18, height 9 mm. 



Hab. The country south of the Grangetic plain from Rajmahal 

 to Bundelkhand, especially on hills at Eajmahal, Patharghatta, 

 near Mirzapur, &c. 



The animal is dark brown or blackish ; both shell-lobes Jong 

 and pointed ; the lobe above the mucous gland very tapering and 

 pointed. 



b'. Very fine microscopic strice. 



140. Macrochlamys hardwickii, Godwin-Austen, Mol. Ind. i, 1883. 

 pp. 105-107, pi. 21, tig. 10 (sculpture), pi. 23, figs. 1-4 (shells), 

 pi. 28, figs. 1, 1 a, 1 b (anatomy). 

 Macrochlamys hardwickii, var. politulus, Godwin- Austen , I. c. 



p. 107. 

 Macrochlamys sylhetensis, Godwin- Austen, Mol. Ind. i, 1883, p. 94, 



pi. 21, fig 1 . 9 (sculpture only, no description). 

 . [ Fide fig. 51 B, p. 133. Genitalia and teeth of the radula.] 



Shell perforate, conoidly depressed to depressed, thin, tawny, 

 with a rather dull, greasy lustre above, more polished beneath, 

 very minutely and closely striated longitudinally, the striaB only 

 visible under a microscope ; spire low, conoidal, suture slightly 

 impressed ; whorls G, convex, the last broader, rounded at peri- 

 phery, convex beneath ; aperture slightly oblique, roundly lunate ; 

 peristome thin, in one plane, columellar margin curved, vertical 

 above, and rather broadly reflected at the perforation. 



Major diam. 16, min. 14, height 9 mm. 



Hob. Lower Bengal, Sylhet, and Western Assam. Typical 

 specimens were obtained in Calcutta. Shells from Upper Assam 

 are, as a rule, rather larger and flatter and are more vitreous. 

 These form the var. politula. 



The shell of M. indica is not easily distinguished except by its 

 coarser and much less close longitudinal sculpture ; generally it is 

 rather larger and flatter. 



The animal differs from that of M. indica in several particulars. 

 The body and tentacles are pale grey, the mantle pale ochraceous. 

 The shell-lobes are smaller. The spermatheca and kale-sac are 

 both considerably longer and the form of the penis is different. 

 The radula contains about 109 rows of teeth, arranged thus : 

 50 . 1 . 12 . 1 . 12 . 1 . 50 (63 . 1 . 63). 



H 



