160 



UKEONIDvE. 



Hob. River Jellinghy, Upper Gangetic Delta. Also recorded 

 in the Indian Museum Collection from Hazrapur and Calcutta. 



Var. chrysis (Benson). 



Unio favidens, var. chrysis, Benson, A. M. N. H. x, 1862, p. 189 ; 

 H. & T., C. I. 1876, p. 19, pi. 41, fig. 3. 



Original description : Longer and less broad in proportion ; 

 epidermis a beautiful green, banded more or less with yellow ; 



Fig. 10. Parreysia (P.) Javidens (Bens.), var. chrysis (Bens.). 

 (Specimen.) Nat. size. 



umbonal rugse very strong and extended ; cardinal teeth mostly 

 narrower than in the type ; nacre salmon-tinted. 



Long. 27, lat. 35, diam. 16 mm. 



Bab. Eiver Dojora at Kareily Ghat, near Bareilly. A specimen 

 in the Indian Museum is labelled Patna. 



Fig. 11. Parreysia (P.] Javidens (Bens.), var. mridula (Bens.). 

 (Specimen.) Nat. size. 



Var. viridula (Benson). 



Unio favidens, var. viridula, Benson, A. M. N. H. x, 1862, p. 189. 

 Original description : Form of type, but more compressed ; 



