36 Records of the Indian Museum. [Vor V £910} 
Modiola jenkinsi, sp. nov. 
Shell subtrapezoidal, scarcely curved, dark green shading to 
a paler colour towards the margins and posteriorly painted with 
thin, pale brown, radiate lines, marked with concentric lines of 
growth; umbones large, very anteriorly situate; dorsal margin 
somewhat straight; ventral margin slightly concave; anterior 
Fic. 5.—Modiola jenkinsi, sp. nov. 
side rather angularly rounded; posterior side sloping above, gently 
rounded below ; interior of shell nacreous, iridescent in places. 
Long. RE feo Onin: 
Lat. es Eee ES pak, 
Hab.—Manikpatna, Lake Chilka. Forming colonies on Ostrea 
lentiginosa, Sow. (Dr. J. T. Jenkins.) 
Type in Indian Museum (Rég. No. M. *45+). 
Differing from M. evansi,! Smith, from S. Siam by its nar- 
rower form and less fan-like shape ; it is also much paler in colour 
and, except for the lines of growth, quite smooth ; moreover the in- 
terior of the shell is much lighter than is the case with M. evanst. 
1 Journ. of Conch., x, p. 368. 
