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711 



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. dislocatns Say. 



Pecten (ventricosus v.ir. ? ) aequisulcatus Cpr. 

 l\-ctfii ti'i/nisiiffiidis 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. dislocatns Say. 



Pecten (Propeamusium) alaskensis Pall. 

 /<</<// ahiski'iisis Pall, 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 Propeamusium resembling /'. squamnla 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. 



l\ftcu pyxidatns, which has been listed from the Pacific coast, is apparently 

 a Chinese species. P. subcrcnatiis Carpenter and P. Toivnsendi 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. 



fliitiiitrs Pefr., Did. Sri. Nat., xxi., p. 169, 1821. Type //. C<-/fsi Pefr. 

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

 IliiniHS Wood, Ann. Mag. Nat. Hist., xxxvii., p. 253, 1841. 



J>C^ Hinnites crassus Conrad. 



Iliiiuit, .v crtissii Conr., Pac. R. R. Rep., vii., p. 190, pi. 2, figs, i, 2, 1857. 

 ? ffinmtes giganteus Csvf, Ann. 1'liil., p. 103, 1826. 

 Cf. I\rt,-n cMihitits Val., Voy. Venus, pi. 18, fig. 2, 1835. 



Miocene of Santa Margarita, Salinas Valley, California. 



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

 + H. PonlsoniConv., 1834) is not uncommon in the Pleistocene, and the young 

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



