CITMINGIA. Panama Shells. 287 



striae; in the lower posterior area with unequal fine raised 

 radiating lines ; in the anterior half with radiating ribs, which 

 are ornamented with small thick vaulted scales ; beaks small, 

 prominent: umbonee prominent, somewhat flattened: lunule 

 defined by the anterior ribs, a little depressed ; ventral margin 

 Bcalloped anteriorly. It is allied to P. pholadiformis Lam. 

 Length .92 inch ; height A2 inch ; breadth .44 inch. 



Station. — Unknown. 



Habitat, — Panama; 0. B. A. 1 

 1 specimen wag obtained. 



478> . SaxicaTa tenuis \ 



Synonymy. 



Saxicava tenuis (?) Sowb. in Proc. Zool. Soc. Lond. p. 88. Aug, 1«34. 



The description of this species is too meagre to enable us to 

 identify our shell confidently. 



Station. — In soft stones near ha,lf tide, level. 



Habitat. — ^Pacosmayo and Lambeyeque ; Cuming 1 . Sowerby. 



Panama ; C. B. A. I 

 1 specimen- was found in the same stone with Modiola, sp. 

 indet. e. 



Family— MACTEID^. 



479. Cnmingia coarctata. 



Synonymy. 



'Cvmingia coarctata Sowb. Gen. pi. — . f. 4. 



Sowb; in Proc. Zool. Soc. Lond. p. 34; Mar. ■ 1833. 



Reeve Conch. Syst. pi. 49. f. 4. Sept. 1841. 



Hanley Supp. Wood Ind. Test. pi. 12. f. 37. 1845 ? 



StatMn.-^^axiA.j, muddy ^bottom, 7 fathoms water ; Ounjingl 

 Sowerby, 



