GXTDE : NEW HELICOIDS FROM THE INDIAN KKGION. 57 



curved, slightly angulated at the junction with the coluraelhir 

 margin, which is almost straight, ascending obli(iuely, triangularly 

 dilated, but not overhanging the umbilicus. Diani. maj. 16'5-17, 

 min. 14-l4'5mm.; alt. 8 mm. 



Hah. — India : Habiung, Garo Hills, Assam (Blanford) ; also West 

 Khasia, Assam. 



Type in the British Museum, presented by the late Dr. W. T. 

 Blanford. 



In shape the new species somewhat resembles the var. theohaldi 

 of P. tapeina, but the shell is much thinner, the whorls are more 

 flattened above and less tumid below, the keel is more pronounced 

 and pinched, and the aperture (]uite different. The principal character, 

 however, separating it from P. tapeina and its varieties lies in the 

 absence of cuticular granules or S(j[uam8e and in the deciduous cuticle. 

 I found specimens in Mr. Leman's collection and in the Bi itish Museum 

 — both the Blanford and the general collection — with the MS. name 

 Tracltia nnta?is, Blf. The specimen in the general collection of the 

 British Museum is a trifle larger, measuring 18 mm. in diameter, and 

 more solid, while the last whorl descends for a considerable distance. 

 Mr. Ponsonby possesses two specimens, received from Lieut. -Colonel 

 Godwin-Austen, labelled " Habiang, Garo". One of these measures 

 18 mm. in diameter and has the aperture more dilated and the 

 basal and columellar margin more curved tliaii the otber specimens 

 I have seen. 



