Notes on Species of CorbiculadcB. 



233 



Somewhat similar to Cyrena ventricosa, from the Philippines, 

 from which it differs, however, in being transversely longer, 

 more inflated, and more inequilateral. 



Fio. 63. 



Cyrena Morchiana. 



I am indebted to Mr. Lea for being able to describe this 

 interesting species, which I take great pleasure in dedicating to 

 Prof. Morch of Copenhagen. 



8. Cyrena lac vis, Prime. 



Cyrena Icevis, Prime. Acad. N. S. Phil. Proc. 125. 1861. 

 Prime Cat. 6. 1863. 



C. testa orbiculatotrigona, compressa, intequilaterali, lsevis ; latere 

 antico rotuudato ; margine superiore convexo, inferiore arcuato ; umbo- 

 nibus parvis, depressis, obliquis, approximatis ; valvis tenuibus, intus can- 

 didissimis; striis obsoletis ; epiderraide viridi, nitente vestita ; cardine 

 angusto. 



Long. 46 ; lat. 42 ; diam. 22 mill. 



Hah. — Borneo. Collect. Prime. 



