100 JOURNAL, BOMB A Y NA TOR A L HISTORY SOCIETY, Vol XV J II. 



Colour. — A clear greenish yellow. Shape somewhat oval. Teeth well 

 developed. Interior a clear white and very iridescent. 



Length. — 29'5. A very beautiful little shell. I have only been able to examine 

 one specimen, but this appears to be quite adult. 



Corbicula occidens (Bens). 



Shell. — Orbicular, furrowed. Epidermis polished. Lateral teeth elongated. 



Colour. — Greenish yellow. Umbo purple. Interior purple. 



Length. — 16-5. 



C. striatella (Desh). 



Shell. — In shape not differing from the last in any marked degree, being 

 perhapa slightly more robust. 



Colour. — Variable. Some I have are greenish brown ; others purplish grey 

 externally, greyish purple internally. One specimen I have, kindly given to me 

 by Captain Peile, was taken in hot springs at Kopili river at 2,000 feet, and has 

 the whole umbo much eroded and eaten away. 



Length. — 20. 



