EXPLANATION OF PLATE XIV. 



Oysters from Indian backwaters. 



Fig. i. — Shells of Ostrea virginiana, Gmelin, from Ennur backwater near Madras: 

 slightly reduced. 

 ,, 2. — A clump of Ostrea virginiana, Gmelin, along with a specimen of 0. cucullata, 

 Born., from the Chilka Lake: slightly reduced. 



The inner surfaces of the valves of 0. virginiana show the deep purple pigmentation 

 characteristic of most living individuals of the species. 



Remains of the corals from the Chilka Lake. 



Fig. 3. — Portion of a stone from the south-eastern side of Rambha Bay bearing 

 skeletal remains of Turbinolid corals, a group of animals not now found 

 in a living condition anywhere in the lake: natural size. 



