250 ZONITIDJE. 



" This shell is an exaggeration of the bascauda type of the 

 Khasia Hills, with a more remote costulation and lengthened 

 attenuate spire. The aperture of the single dead specimen col- 

 lected by Mr. W. T. Blanford is not in the best condition." 



Several specimens of this pretty species occur among the shells 

 collected by Mr. W. Eobert in the hills east of the Teesta River 

 also an allied form from Damsang.] 



[Benson described a species as allied to macropleuris, viz. H. corys. 

 This single dead specimen I find is in the Blanford Collection, 

 which he presented by will to the Natural History Museum. The 

 specimen has suffered much since Benson described it, and it is 



D 



Fig. 82. 



A. Eahula corys. Bs. Type. Young shell, X 9. 



B. Apex of specimen No. 34, Blanford's Collection, named macropleuris, X 9. 



C. Apex of 7?. macropleuris, Bs., X 9. 



D. 2t. corys, Bs., Damsang, X 6. 



E. Ditto, ditto, x 3. 



now only 2 mm. in length ; the aperture and last whorls gone. I 

 give a drawing of this (fig. 82, A); also one of the apex of a true 

 macropleuris and the Damsang specimen the three enlarged to 

 the same amount. I cannot see any appreciable difference be- 

 tween the apex of corys (fig. 82, A) and specimen No. 34 (fig. 82, B). 

 The suture is marginate near the apex ; the costulation at remote 

 intervals does not begin until the fourth or fifth whorl. I refer 

 this form to Benson's If. corys. 



The apex of typical macropleuris (fig. 82, C), it will be seen, is 

 distinctly filose at the suture, even at the third whorl ; and the 

 side of the spire is flatter, very different to fig. 82, A & B. 



