88 Proceedings of the Asiatic Society. [Mar. 



could 1)0 almost taken for that inReeve's Icon. vol. xiii, Monog. 

 Cgclophorus, pi. xiii, where an account of the history of the species is 

 given, according to Benson. Chemnitz very probably received a 

 specimen of this species from the Nicobars, together with Cyclophorus 

 turbo, Chem., through the Moravian Missionaries; for I also 

 obtained two specimens oifoliacem from the neighbourhood of the 

 Nancowry harbour on Camorta, though this species is here, as 

 compared with the peculiar Nicobar one, very rare. 



Mr. T r y o n further mentions from the Audamans Plectopylis 

 achatina, Gray. I never received a specimen from there, but found 

 tho species most abundant near Moulmein on the lime-stone hills, and 

 only on these. I don't know whether there are any limestone rocks 

 on the Andamans. A species allied to Helix prociimbens and gabata 

 of Gr o u 1 d occurs at the Andamans, and very young shells are 

 not much unlike those of PI. achatina. 



The same author further mentions Jlelicina Nicobarica, Phil. ; 

 this is probably Uel. scrupulum, Benson, A.M. N. H., 1863, 

 3 ser., vol. xii, if at all distinct from the last. 



IY. — Notes on the genus Sara, by Surgeon F. Day. (Abstract). 



The author describes a new species, IT. Jerdoni, of this remarkable 

 genus of siluroid fishes, and offers general remarks regarding the 

 only other two Indian species which he admits, H. Buchanani, and 

 H. conta. 



This paper will appear in the first number of the Journal for this 

 year, to be published shortly. 



V. — Note on North Westers, — by the Hon'ble J. B. Phear. 

 In this note I merely offer an hypothesis to explain the re- 

 markable " Nor- Wester" storms, which invariably precede the 

 setting in of our rainy season. We are all familiar enough with the 

 phenomena, the typical form of which may be described pretty near- 

 ly as follows : — The monsoon breeze is blowing steadily from the 

 Bay of Bengal, (>ny 8. E., S. or S, W.). A heavy mass of clouds 

 appears in the N. W.; it rises in the sky very rapidly, preserving 

 au even front, which stretches in a long sharply defined line from 

 S. W- to N. E. Eain is seen to be falling towards the N. W, ; 



