CO ZONITIDiE. 



The teeth of the rackila are of the same form, the formula differing 

 shghtly : + . 20 . 2 . 10 . 1 . 10 . 2 . 20 +. 



The jaw has a nearly straight edge with a slight central 

 projection, and differs from sequax from Darjiling.] 



[Macrochlamys sequius, Gochvin-Austm (very vouua), Mol. Ind. ii, 

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



Shell depressedly conoid, umbilicated, glassy, rather solid ; 

 sculpture fine, but distinct and regular longitudinal strife ; colour 

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

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

 vertical ; peristome slightly thickened, columellar margin very 

 slightly reflected. 



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



Localit)/. Darjiliug (ex Coll. Calcutta Museum).] 



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

 fig. 7 : IGodwhi-Ansten, Mol'. Ind. ii, 1907, p. 162, pi. 109, fig. 6 

 (a very young gliell)]. 



Shell perforate, depressed, thin, polished, microscopically marked 

 with faint, subdistant, longitudinal (spii-al), impressed lines above 

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

 yellowish to brownish horny ; spii*e low, suture well impi'essed ; 



Fig. 41. — Macrochlamys sivperfina. 



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. 17|, height 10 mm. 



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

 tarn (4000-5000'). 



This somewhat resembles M. sequa,v, but is distinguished by 

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

 mature shells of j\I. hd>riea, but may be known by the presence of 

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



[129. Macrochlamys rakaensis, Godivin-Atisten, Mol. Ind. ii, 1907, 

 p. 104, pi. 110, tigs. 2-2 6. 



Shell subdepressedly globose, very narro\\"ly perforate ; sculpture 



