COMPLETE GRAU : PECTINIDAE OF THE EASTERN PACIFIC 85 



Pecten denticulatus Adams & Reeve, 1848, p. 74, pi. 21, fig. 14. Borneo. 



[= juvenile P. hastatus Sowerby, fide Bavay, 1905, p. 29.] 

 Pecten altiplicatus Conrad, 1857a, p. 191, pi. 3, fig. 2. Pliocene of the 



San Raphael Hills, Santa Barbara County, California, 

 Pecten altiplectus [typ. err. for altiplicatus] Conrad, 1857b, p. 313. 

 [non] Pecten hastatus Sowerby. Vaillant, 1865, p. 112. "desert de 



I'Attaka." [= Chlamys squamosa var. decoriata Jousseaume in 



Lamy, 1928 (p. 170. "Djibouti, Aden." Not figured.), fide Lamy, 



loc. cit. Latter species = Pecten Ruschenbergeri Tryon, 1870 (p. 



171, pi. 14, fig. 1. "Bay of Muscat."), fide Eames k Cox, 1956, p. 



13, "Muscat . . . Aden . . . Red Sea . , , M, Miocene, U. Miocene 



and Pliocene of Persia."] 

 Pecten hastatus Sowerby. Kobelt, 1888, p. 233, pi. 62, figs. 1, 2. "an 



der Nordwestkiiste Nordamerikas." 

 Pecten (Chlamys) hastatus Sowerby. Arnold, 1903, p. 109, pi. 11, figs. 



4, 4a. Pliocene: San Pedro, Santa Barbara, San Diego (Arnold). 



Pleistocene: San Pedro, Santa Barbara (Arnold). Living: San 



Pedro (Oldroyd; Raymond).— Arnold, 1906, p. 108, pi. 41, fig. 4; 



pi. 42, figs. 1, la, 2, 2a. Living: Quatsino Sound, British Columbia, 



to San Diego. Also previous Pliocene and Pleistocene records. — 



Dall, 1921, p. 18. Monterey to San Pedro, California. 

 Pecten (Pecten) hastatus Sowerby. Grant & Gale, 1931 [ex parte], p. 



166, pi. 11, figs. 6a, 6b. P. hericius Gould erroneously synonymized. 



Alaska to San Diego. 

 Chlamys hastata Sowerby. Bavay, 1936, p. 309. "= denticulatus Adams 



et Reeve (juv.)." 

 Chlamys hastatus hastatus (Sowerby). Abbott, 1954, p. 364, pi. 34, fig. 



j. Monterey to Newport Bay, California. 

 Holotype: British Museum. 



Type locality: Here designated San Diego, California. (Probable 

 source of Sowerby's specimens; many specimens from there examined by 

 present author.) 



Original description : T. ovali subtrigona, subelongata, scabra ; 

 auriculis inaequalibus, posticis minimis, anticis magnis, scabroso-sulcatis ; 

 valva sinistra, costis 8, inaequalibus, valde elevatis, angulatis; spinas 

 numerosas, erectas, subcrispatas ferentibus, costis interstitialibus numer- 

 osis, inaequalibus, serratis ; valva dextra, costis 22, angulatis, spinosis; 

 colore rubro, intus albo. Long. 0.95; lat. 0.30; alt. 1.15; poll. 



Oval, inclining to triangular, rather elongated, rough ; with very 

 unequal ears, the posterior ones being very small ; the upper valve has 



