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TERTIARY FAUNA OF FLORIDA 



Pleistocene of San Pedro, San Diego, and Lower California; Hemphill, 

 Stearns, and Orcutt. Living from. Santa Barbara southward. 



This species is the Pacific coast analogue of P. dislocatiis Say. 



Pecten (ventricosus var. ? ) sequisulcatus Cpr. 

 Pectcn aquisulcatus n. s. ? Carpenter, Suppl. Rep. Brit. As., 1863, p. 645 ; Ann. Mag. 

 Nat. Hist. Mar., 1865, p. 179. 

 Found with the preceding. 



This form bears to ventricosus precisely the relation which P. irradians 

 Lamarck, on the Atlantic coast, bears to P. dislocatiis Say. 



Pecten (Propeamusium) alaskensis Dall. 

 Pecten alaskensis Dall, Am. Journ. Conch., vii., p. 155, pi. 16, fig. 4, 1871. 



Pleistocene of Vancouver Island, near Esquimalt, and at various points in 

 Alaska. Living from Bering Sea to Panama Bay, usually in deep water. 



This species has twenty to twenty-two internal rib-like lirae. 



There is a small species of Propcaimisiinn resembling P. sqiiamnla Lam. 

 in the Arago beds of Oregon, but the exterior is not yet known. It is prob- 

 able that a fair number of additions to this list may be made when the 

 different horizons of the Pacific coast are sufficiently explored. 



Pecten pyxidatiis, which has been listed from the Pacific coast, is apparently 

 a Chinese species. P. subcrcnatiis Carpenter and P. Tozvnscndi Gould seem to 

 be list-names, cited in Carpenter's supplementary report to the British Asso- 

 ciation in 1865, but never characterized and now unidentifiable. 



Subgenus HINNITES Defrance. 

 Hinnites Defr., Diet. Sci. Nat., xxi., p. 169, 1821. Type H. Coi-tesi Heir. 

 Hinnita Ferussac, Tabl. Syst., p. xl., 1822. 

 Hinnus'Woodi, Ann. Mag. Nat. Hist., xxxvii., p. 253, 1841. 



Hinnites crassus Conrad. 

 Hinnites crassa Com:., Pac. R. R. Rep., vii., p. 190, pi. 2, figs, i, 2, 1S57. 

 1 = Hinnites giganteus Gray , Ann. Phil., p. 103, 1826. 

 Cf. Pecten comatns Val., Voy. Venus, pi. 18, fig. 2, 1835. 



Miocene of Santa Margarita, Salinas Valley, California. 



It should be mentioned that Hinnites giganteiis Gray (Ann. Phil., 1826, 

 -f- H. Poidsoui Com-., 1834) is not uncommon in the Pleistocene, and the young 

 shells, which sometimes reach the length of thirty millimetres before becoming 



