312 WEST SOUTH AMERICAN SHELLS — STEARNS. 



36. Venus (Chione) compta Brod. 



Valves only. 



Payta; Mauta. 



This species was described by Broderip from specimens dredged by 

 Hugh Cnmiug in the Bay of Sechura, Peru; "bottom sand and mud. 

 depth 7 fathoms." Not often met with in collections. 



37. Venus (Chione) amathusia Plii). 



Bahia] Panama. 



This beautiful species is also now carried farther south than by 

 previous reports. 



38. Tapes (Cuneus) histrionica Sby. 



Numerous fresh specimens. 



Panama. 



39. Tapes (Cuneus) grata Say. 



Dead Man's Island, Bay of Panama. 



Carpenter, in his Mazatlan MoUusca, has pointed out the difterences 

 between this and the foregoing species which appear to be constant. 1 

 am quite sure that certain color and sculpture varieties of both of the 

 above have been described as species by various authors, for the facies 

 of the west coast shells of this group varies exceedingly through the 

 character of the local stations at which they occur. 



40. Tapes (Cuneus) antiqua Kiug. 



Several examples. 



Dead Man's Island, Bay of Panama. 



This species is probably the same as the Venus costellata Sby., and the 

 specimens obtained by Dr. Jones recall characters in part of T. grata 

 and certain aspects of the Californiau T. staminea Conrad. 



41. Petricola ventricosa Desh. 



One perfect specimen. 

 Payta. 



42. Venerupis oblonga Sby. 

 ? =r Petricola elliptica Sby. + P. soUda Sby. 



A variable form well represented by numerous good specimens of 

 various sizes. 



Payta; Manta (valves). 



The specific name oblonga has precedence by priority of description 

 over the others. 



43. Donax punctatostriatus Hauley. 



Abundant at the following places; chiefly odd valves. 

 Pacasmayo; rayta. 



