CORBULA. Panama Shells. 299 



odd valves, of a clear pink color, were picked up ; 

 Cuming ! Sowerby : also Reeve. 

 S. America ; Hanley. 

 Taboga ; C. B, A. ! 



6 odd valves and 1 entire specimen were found. The latter 

 is of extraordinary size and thickness, Its dimensions are 

 length 1.22 inch ; height .81 inch ; width .68 inch : it weighs 

 f oz. On and around the umbones, it is of a clear pink color. 



506. Corbula rubra. Nov. sp. 



Shell subovate, moderately inequivalve and inequilateral, 

 posteriorly acuminate, with the ventral margin arcuate, anteriorly 

 rounded : rufous, with a short white ray on the anterior side of 

 the umbo, and a dark red spot before it : with fine concentric 

 strire, decussated by radiating microscopic striae ; beaks not very 

 prominent : umbones prominent, somewhat angulated on both 

 sides near the beaks : teeth small. Our unique specimen has a 

 broad flexure a little behind the middle ; but this may be an 

 accidental growth. 



Length .31 inch ; height .19 inch ; breadth .14 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 

 Only 1 specimen was obtained. 



507. C orb ula tennis. Nov. sp. 



Synonymy. 



Corbula tcnuis Sowb. in Proc. Zool. Soc. Lond. p. 36. Mar. 1836. 



- Mull. Syn. Test. Viv. p. 231. May 1836. 



- Reeve Conch. Icon. pi. 2. f. 13. Sept. 1843. 



Station. Sandy mud, at the depth of 12 fathoms ; Cuining ! 

 Sowerby : also Reeve. 



Habitat. Bay of Montijo ; Cuming! Sowerby: alsoMiiller: 



also Reeve. 



Mazatlan ; E. Jewett ! Gould MSS. 

 Panama ; C. B. A. ! 



