220 HELIOID^. 



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. iEgista emensa, Godwin-Austen. 



Helix ( Trachia) e^nensus, Godwin-Austen, P. Z. S. 1888, p. 242. 

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

 p. 209. 



Original description : — " Shell subdiscoid, widely umbilicated ; 

 sculpture ill-defined irregidar 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." (Godivin- 

 Austen.) 



Hah. Burma : Hlindet (Spratt). 



" This species belongs to the A^dely distributed group in this 

 part of India represented by II. nJcoutongensis, 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 ot* 

 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. .ffigista clara, Godwin- Austen. 



Helix {Trachia) clartis, Godwin- Austen, P. Z. S. 1888, p. 242. 

 Euloin {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. 



