220 HELICID^E. 



the peristracum itself bearing elongate papillae. One of these 

 specimens measures 18 : 16 : 9*5 mm. and the other 16*5 : 14'5 : 

 8*5 mm. 



190. JEgista emensa, Godwin-Austen. 



Helix ( Trachid) emensus, Godwin- Austen, P. Z. S. 1888, p. 242. 

 Eulota (Plectotropis) emensus, Pilsbry, Man. Conch, ser. 2, ix, 1895, 

 p. 209. 



Original description : " Shell subdiscoid, widely umbilicated ; 

 sculpture ill-defined irregular transverse striation ; colour horny 

 or pale ochraceous ; spire subconoid, apex blunt ; suture shallow ; 

 whorls 7, regular, flat, closely wound, the last descending 



Fig. 84. Mgista emensa. 



suddenly, subangulate on periphery ; aperture nearly circular, 

 oblique ; peristome much reflected below, the margins joined by 

 callus on body-whorl. 



" Size : maj. diam. 13-5, min. 11*8, alt. axis 4*8 mm." (Godtuin- 

 Austen.) 



Nab. Burma : Hlindet (Spratt). 



" This species belongs to the widely distributed group in this 

 part of India represented by H. akoutongensis, oldhami, etc. This 

 form is much smaller, and differs sufficiently from all the species 

 I know." 



The present species is allied to P. catostoma, but the last whorl 

 is less deflexed in front and keeled at the periphery instead of 

 angulated, the upper portion being slightly impressed above the 

 keel. It further differs from that species by the umbilicus being 

 not quite so infundibuliform and a little wider, showing more of 

 the penultimate whorl. The periostracum is papillate. 



The above figures have been prepared from the type in the 

 British Museum. 



191. JSgista clara, Godwin- Austen. 



Helix (Trachid) clarus, Godwin- Austen, P. Z. S. 1888, p. 242. 

 Eulota (Plectotropis) clarus, Pilsbry, Man. Conch, ser. 2, ix, 1895, 

 p. 209. 



Original description : " Shell subdiscoid, openly umbilicated ; 

 sculpture irregular, close transverse striation ; colour white (but 

 both specimens are bleached) ; spire depressedly conical, apex 

 rounded ; suture shallow ; whorls 5, flat subangulate on periphery, 

 the last slightly descending ; aperture oval, very oblique ; peri- 

 stome thin, slightly reflected. 



