I9I9-J N. ANNA-NBAhis.&B. Fraskad ■.Gangelic Delia Molluscs. 247 



Stenothyra echinata, sp. nov. 

 (PlateXX, fig. 5). 



The shell is small, solid, transluscent and pale in colour. It 

 has a very regular conoidal form except that the ventral surface 

 of the body-whorl is flattened and the anterior part narrowed. 

 The apex is pointed but not acuteh'. There are 5^^ whorls. The 

 suture is not deeply impressed, but is oblique and irregular ; the 

 whorls of the spire increase gradually and evenly. The body- 

 whorl is broad ; in dorsal view it appears to be transverse and 

 almost quadrate, but as seen from below it is truncato-ovoid, the 

 truncation being posterior. The mouth of the shell is very small 

 and oblique; it has a regularly oval form. Its rim projects little 

 and the shell is not umbilicate. The whorls of the spire are appa- 

 rently smooth, but are covered with a deposit in the specimen ex- 

 amined. The penultimate whorl and the one behind it bear a 

 single spiral row of sharp, flattened, horny spines, which are direct- 

 ed towards the apex and slightly inwards ; they have a golden 

 yellow colour. The body-whorl is sculptured with the spiral 

 punctured lines common to most species of the genus. 



The operculum is thin and horny, of the normal paucispiral 

 type. . 



Measurements of type-shell {in millimetres). 



Type-specimen: M "^'" in the collection of the Zoological 

 vSurvey of India. 



Locality. — A sina;le specimen was found among semi-aquatic 

 vegetation at the edge of the river Pussur at Khulna, July 22nd, 

 1918. 



The most characteristic feature of the shell is the row of 

 spines on the basal part of the spire. Otherwise it is very like 

 that of 5. dtltae (Benson), specimens of which were found with it, 

 but it is much smaller, narrower and less inflated in the body- 

 whorl and the mouth is a little larger and relatively narrower. 



Stenothyra soluta, sp. nov. 



(Plate XX, fig. 6). 



The shell is of moderate size, thick, globose, with the spire 

 flattened, concave at the apex (fig. 3) ; the whorls are very distinct 



