95G JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XVII. 



Planorbis compressus (Hutton). This is, I believe, a widely distributed 

 species in India. My few specimens were taken from the leaves of water lilies 

 <>u one of the large jheels. 



Planorbis exustus (Desh.). The above remarks will also apply to this species. 



PELEOYPODA. (EULAMELLIBRANCHIATA). 

 Fam. Unionise. 



Unio flavidens (Bens.). Common and found in the mud of lakes and jheels. 

 Pearls of more or less value are sometimes obtained from this species. 



Unio cceruleus (Lea.\ This beautiful species is common and found in the same 

 situations as the last. 



Unio marginalia (Lam.). Found in the mud of rivers, but I cannot say 

 whether it occurs commonly as I have seen only a few specimens. 



Unio corrugatus (Smith). This is a common species, occurring with U.flavidens 

 and U. cceruleus. 



Corbiculla occidens (Bens.). This pretty little shell occurs abundantly in all 

 jheels and lakes. 



Corbiculla sp. ? A very small bivalve was collected for me by my sister, 

 Miss Aileen Dalgliesh, to whom I am indebted for the other shells mentioned 

 in this paper, which I sent to the authorities of the British Museum. It was 

 returned to me marked " Corbiculla sp. ? " ; no one evidently seeming to 

 know to what species to assign it, neither can I find a specimen like it in the 

 National collection. It may therefore be new. I give a description. Size 

 small ; shell orbicular, deeply furrowed ; epidermis ( ? periostracum) glossy. 

 Exterior olive green with bold radiating bands of greenish brown, middle 

 band broader than the rest. Interior brownish pink, marked with white 

 towards the apex. Teeth white. Length 7 mm. Two specimens. Locality 

 Munjoul Lake, Tirhoot, Bengal. 1904. 



