1875.] W. T. Blanford — Notes on some species of Reptiles. 209 



are congeneric without doubt, and Blepharosteres agilis is an Ablepharus, 

 but it differs from A. pusillus in its much longer body. In A. agilis the 

 fore limb does not nearly reach half way to the thigh and the hind limb 

 barely reaches half way to the axil. In A. pusillus the fore limb reaches 

 fully half way to the thigh or rather more and the hind limb two-thirds of 

 the way to the axil. In the former the third and fourth toes of the fore 

 foot are about equal in length, in the latter the third finger is decidedly the 

 shorter. Under these circumstances I think it probable that A. pusillus* 

 is a distinct species and that A agilis is probably distinct from A. Brandti, 

 Strauch. 



XX. — The Evidence of past Glacial Action in the Nag a. Hills, Assam. 

 By Major H. H. Godwin- Austen, M B. G. S., F. Z. S. 

 (Eeceived July 25 ; — Read August 4, 1875.) 

 With Plates X— XIII. 

 When carrying on the survey operations in the Khasi Hills, I was more 

 than once led to think that glacial action had played a part in the denudation 

 of some of the valleys ; but the traces of such action were so slight that I 

 hesitated to notice them. However, when writing the paper on the West Khasi 

 Hills which was published in this Journal in 1869, I alluded to the subject, 

 with reference to the valley near Mokarsa, under the Maotherichan ridge. 

 When mapping the Jatinga valley, I met with lines of heavy subangular 

 debris, skirting streams from the north side of the high ridge the west ex- 

 tremity of the Burrail running thence to Asalu. Under and to north of the 

 peak of Mahadeo, there is a terminal mass of transported material near where 

 the Naga village of Grarilo formerly stood. On the north of the Shillong 

 peak, the highest part of the Khasi Hills, skirting the sides of the " Urn- 

 shirpi" stream, are to be seen the remnants of deposits for which it is diffi- 

 cult to account, unless we bring in the agency of ice, or large melting snow- 

 beds. The " Umshirpi" has cut a deep gorge through the altered sand- 

 stones below the point where the road from Cherra Poonjee crosses it, and 

 here takes a very sharp bend ; since its original excavation, a bed of water- 

 worn boulders has filled the valley, and caps the spur round which the 

 stream winds, and is seen again in the road-cutting on the right bank quite 

 25 feet above the present stream, as one proceeds to the Artillery barracks 

 from the station side, shewing clearly it was once continuous, and has since 



* A. pusillus is figured in the 'Zoolog3 r of Persia,' PI. XXVII, fig. 1. 



