PAEREYSIA. 



161 



colour as in the last ; cardinal teeth broad ; nacre bluish white ; 

 umbonal rugae as in var. chrysis. 



Long. 27, lat. 40, diam. 17 mm. 



Hob. Standing water, or <4 jheel," between Hameerpore and 

 Someerpore, Bundelkhund. 



Indian Museum specimens are from Damuda ; Manbhoorn ; 

 Gunduk, Ranigunga and Patna. 



Var. assamensis (Nemll MS.), Preston, Kec. Ind. Mus. Calcutta, 

 vii, 1912, p. 299. 



Shell more convex than the typical form, the dorsal margin 

 rather less posteriorly angled, the anterior side is more rounded 

 and the posterior slightly more nasute. 



Hob. Dihong. 



Fig. 12. 



-Parreysia (P.)favidem (Bens.), var. assamensis, Preston. 

 (Type.) Nat. size. 



Specimens in the Indian Museum are also labelled as follows : 

 Assam; Arrah ; Sylhet. 



Type in Indian Museum, Calcutta. 



Fig. 13. Parreysia (P .) favidens (Bens.), Tar. pinax (Bens.). 

 (Type.) Nat. size. 



Yar. pinax (Benson). 



Unio pinax, Benson, A. M. N. II. x, 1862, p. 192. 

 Uniofauidens, var. pinax, H. & T., C. I. p. 6, pi. 11, fig. 2. 



Original description: Testa transverse oblonga, suboblique 



H 



