FOSSIL FKESHWATER SHELLS. 



38y 



XXII. NOTE ON THE FRESHWATEE SHELLS 

 FEOM THE SEWALIK HILLS. 



BY THE LATE PROFESSOR EDWARD FORBES.^ 



Recent. 



Pulmonifera : 

 Planorbis 1 





(identical with speci- 

 men unnamed in Mr. 

 Lyell's collection). 

 2 (in Mr. Lyell's collec- 

 tion lymamed). 

 3 

 4 



Pectenihranchiata : 

 Paludina unicolor 

 „ Bengalensis 



(in Mr. Lyell's collec- 

 tion unnamed) 



Melania thiarella 



corrug-ata 



Fossil. 



Planorbis identical with No. 1. 



Pupa? Not resembling any specimens 

 I have seen in the East. 



Paludina unicolor 



allied to P. Bengalensis, but ap- 

 parently distinct. 



Melania, quite distinct 

 recent one I have seen. 



from 



any 



I 



AmpuUaria glauca ? 



Lamellihranchiata : 

 Unio favidens, Benson (Mr. Lyell's 

 specimen; U. corrugata. 

 Lam. ?) 



„ marginalis, Lam. 



„ (undescribed ?) 

 „ (undescribed ?) 



Cyrena (small species). 



' N.B. The materials for this compari- 

 son in recent forms of India are very li- 

 mited and incomplete. — [H. F.] 



This note, by Professor Forbes, was 

 ■written about 1846. It has not been 



AmpuUaria glauca 



identical with specimens from 

 the Jumna. DiiFering some- 

 what from the recent Sewalik 

 specimens. 



Unio favidens, a variety. 



„ (near a Jumna specimen in 

 Mr. Lyell's collection). 



M 



)} 



published before. Several of the Sewalik 

 fossil freshwater shells were figured in 

 the Journal of the Asiatic Society, vol. 

 iv. Plate xlviii. — [Ed]. 



