88 ZONITID^E. 



The teeth of the radula are of the .same form, the formula differing 

 slightly : + . 20 . 2 . 10 . 1 . 10 . 2 . 20 +. 



The jaw has a nearly straight edge with a slight central 

 projection, and differs from sequav from Darjiling.] 



[Macrochlamys sequius, Godwin-Austen (very young), Mol. Ind. ii, 

 1907, p. 168, pi. 109, fig. 7. 



Shell depressedly conoid, umbilicated, glassy, rather solid ; 

 sculpture fine, but distinct and regular longitudinal striae ; colour 

 pale sienna-brown ; spire flatly conoid ; suture shallow ; whorls 

 nearly 4, the last well rounded ; aperture ovately lunate, sub- 

 vertical ; peristoine slightly thickened, columellar margin very 

 slightly reflected. 



Size : major diam. 5*0, alt. axis 1*9 mm. 



Locality. Darjiliug (ex Coll. Calcutta Museum).] 



128. Macrochlamys superflna, Elf, P. Z. S. 1904, ii, p. 442, pi. 25, 

 fig. 7 ; [Godwin- Austen, Mol. Ind. ii, 1907, p. 162, pi. 109, fig. 6 

 (a very young shell)]. 



Shell perforate, depressed, thin, polished, microscopically marked 

 with faint, subdistant, longitudinal (spiral), impressed lines above 

 and often below, the spaces between the lines papillate, pale 

 yellowish to brownish horny ; spire low, suture well impressed ; 



Fig. 41. Macrochlamys superflna. 



whorls 6, rather rapidly increasing, the last broader, rounded at 

 the periphery and convex beneath ; aperture slightly oblique, sub- 

 ovately lunate, broader than high ; peristome thin, basal margin 

 almost straight when viewed from below, columellar vertical 

 above, then obliquely curved, rather broadly reflected at the 

 perforation. 



Major diam. 20, min. 17J, height 10 mm. 



Hal. Sikhim. Common in the Upper Teesta Valley about Sing- 

 tarn (4000-5000'). 



This somewhat resembles M. sequax, but is distinguished by 

 larger size and different sculpture. It is also very much like im- 

 mature shells of M. lubrica, but may be known by the presence of 

 longitudinal sculpture, more numerous whorls, colour, &c. 



[129. Macrochlamys rakaensis, Godwin-Austen, Mol. Ind. ii, 1907, 

 p. 164, pi. 110, figs. 2-26. 



Shell subdepressedly globose, very narrowly perforate ; sculpture 



