COMPLETE GRAU : PECTINIDAE OF THE EASTERN PACIFIC 143 



CLARION ISLAND, REVILLA GIGEDO ISLANDS, MEXICO: 



Sulphur Bay, 57 fathoms, nullipores, sta. 137-34. 

 ANGEL DE LA GUARDA ISLAND, GULF OF CALIFORNIA: 



62-76 fathoms, sand, sta. 1080-40. 



Pecten diegensis Dall 1898 

 Plates 52-53 



Pecten floridus Hinds, 1845, p. 60, pi. 17, figs. 6, 6a. "Inhab. San 



Diego, California. In five fathoms, among mud." 

 [non] Ostrea florida Gmelin, 1791, p. 3330. "Habitat . . ." 

 Pecten (Vola) floridus Hinds. Kobelt, 1887, p. 212, pi. 57, fig. 2. "bei 



San Diego, in Californien." 

 Janira florida Hinds. Cooper, 1888, p. 244. 



Pecten (Janira) floridus Hds. Williamson, 1892, p. 193. San Pedro. 

 Pecten (Pecten) diegensis Dall, 1898, p. 710. "Pleistocene of San 



Diego; Hemphill. Living on the adjacent shores from Monterey, 



California, southward." New name for P. floridus Hinds, non 



Ostrea florida Gmelin. 

 Pecten diegoensis [sic] Dall. Keep, 1904, p. 39. 

 Pecten (Pecten) diegensis Dall. Arnold, 1906, p. 127, pi. 51, figs. 1, la, 



lb. Previous records cited. 

 Pecten (Janira) stearnsii Dall variety diegensis Dall. Grant & Gale, p. 



223, pi. 3, fig. 4. Pliocene of Ventura County, California. Also 



previous fossil records. 

 Pecten (Pecten) diegensis Dall. Hertlein, 1935, p. 302, pi. 19, figs. 5, 



6. Monterey Bay, California to the San Benito Islands, Lower 



California. — Hertlein & Strong, 1946, p. 56. "Cordell Bank [off 



Bodega Bay], California, to Gorda Banks, off Cape San Lucas, 



Lower California." 

 Holotype: British Museum. 

 Type locality : San Diego, California. 



Original description : Testa orbiculari, plano-subconvexa, aequiauri- 

 culata; valva sinistra planulata, prope medium subelevata, rufescente 

 sparsim albo maculata, costis viginti-duo ad latera compressis, superne 

 rotundatis cum interstitiis laminis minimis epidermidis transversim 

 striatis; valva dextra subconvexa. pallescente, costis quadratis, medio 

 sulco impressis ; auriculis aequalibus, rectis, laevibus, epidermide indutis ; 

 intus alba, versiis auriculas et margines saturate fusca. 



Additional description: Shell averaging about 60 millimeters In 

 altitude, longer than high, inequivalve, plano-convex, or nearly so. 



