TO Contributions to Indian Malacology. [No. 1, 



across the specimens, and I am under the impression that they were 

 found dead in salt water marshes on the Arakan coast, and not in the 

 delta, but they are both so common in all Indian estuaries, that it is 

 equally probable that I found them in the Bassein river. 



Family VENERIBvE. 

 No. 35, Chione Ceylonensis, Sow. 



I have mislaid my notes as to the exact locality of this species also. 

 I think it was found at Dalhousie. In a backwater on the Arakan 

 coast, I found an allied, but undescribed species of the same genus. 

 No. 36, Artemis, sp. 



Of this I have a single immature specimen. It may be the young 

 of A. excisa, Chem. but has not the sculpture of that species, nor its 

 angulate posterior slope. 



Family CTRENID^J. 

 No. 37, Cyrena Bengaiensis, Lam. 



Mangrove and other salt water swamps along the edges of creeks, 

 amongst roots of trees and brushwood, common. 



I am inclined to refer the shells I obtained to the above form, of 

 which I suspect some others since described are merely varieties. 

 Gyrence vary greatly with age, besides being eminently variable in 

 form. Thus some of my specimens exactly agree with G. turgida 

 Desh., but I cannot help believing that they are merely immature 

 specimens of the thicker form which I refer to G. Bengaiensis. 



Family MYTILID^J. 

 No. 38, Mytilus smaragdinus, Chem. 



Found in creeks below low water mark. I do not think it is gene- 

 rally known that the flesh of this species is very delicious. Some 

 were brought to me along with a quantity of oysters, and the Bur- 

 mese told me that the mussels were the better eating of the two. 

 Not having much faith in Burmese palates, I preserved the shells and 

 threw away the soft parts of the Mytili ; but as a trial, I had two or 

 three cooked with the oysters. I found that the Burmese were quite 

 right, though the oysters were by no means unpalatable. 

 No. 39, Modiola emarginata, Bens. 



A dwarf variety of this species occurs in salt water creeks. 



Family ARCID^E. 



No. 40, Area (Anomaloeardia) granosa, L. 



This very common species was only found at one spot in the Bas- 

 sein river, It was living in mud close to the surface, under stones and 



