igii.] H. B. Preston : Descriptions of new Shells. 41 



anterior side abruptly rounded; posterior side sloping above, 

 very obtusely rounded below; interior of shell pinkish violet, 

 except for the scars, which are black. 



Ivong. . . . . • • 7 mm. 



lyat. .. .. .. 19-75 ^^ 



//«6.— Rambha, S. end of Lake Chilka (Dr. N. Annandale) : 

 on stones between tide marks. Type in Indian Museum, Calcutta. 



(M. 5-\5-l.) 



Modiola celator^ sp. no v. 



Shell small, convex, subtrapezoidal , slightly curved, dark 

 olive, sculptured at the extreme anterior side and posteriorly 

 with rather coarse, well-defined, radiate riblets ; umboes small, 

 flattened, not prominent, very anteriorly situate; dorsal margin 



Fig. 5. — Modiola celaior, sp. nov. 



sloping; ventral margm excavated in the middle; anterior side 

 gently rounded ; posterior side very obtusely rounded. 



Long. 



3 mm. 



Lat. . . . . ^ 



Hub. — Puri Beach, Orissa Coast: in drift wood (Dr. N. Annan- 

 dale). Type in Indian Museum, Calcutta. (M. ^-Ji±3.) 



Modiola chilkaensis , sp. nov. 



Fig. 6. — Modiola chilkaensis , sp. nov. 



Shell trapezoidal, rather inequivalve, the right valve being 

 more convex than the left, thin, pale green, streaked and spotted 

 with reddish purple, both valves marked with concentric hues of 

 growth and radiately sculptured at the extreme anterior side and 

 posteriorly with somewhat irregular costulae ; umboes small, not 

 very prominent, very anteriorly situate; dorsal margin sloping. 



