TRANSACTIONS OF WAGNER 

 710 



TERTIARY FAUNA OF FLORIDA 



Pecteii latiauritus var. fucicolus Dall. 



With the last, and Uving on fuci, south to Cape St. Lucas. 



Shell moderately compressed, smooth, concentric, sculpture obsolete; ribs 

 low, rounded, wide, eatire ; hinge-line shorter than in the type, and without 

 any sinus between the posterior ears and the disk. Alt. 30, lat. 31 mm. 



This form lives attached by the byssus to the giant kelp of the Californian 

 coast, and the absence of shock, due to the floating situs, is probably cor- 

 related with the obsolescence of the ribs and posterior sinus. Intergradations 

 with the type are not at all rare. 



Pecten (Patinopecten) caurinus Gould. 

 Pecten caurinus Gould, Proc. Boston Soc. Nat. Hist., p. 236, 1850. 

 Pecten yessoensis Cpr., 1863, non Jay, Perry's Voy., 1856, + P. propatiilus Carpenter, 



1863, non Conrad, 1849. 

 ? Pecten Mee kit Conx3.A, Pac. R. R. Rep., vii., p. 190, pi. i, fig. i, 1857. 



? Miocene of California, Blake; not yet reported from the Pleistocene of 

 California, but will probably be found in later beds of Puget Sound and 

 vicinity when fully explored. Living about Puget Sound. The Japanese 

 species is constantly distinguished by its smaller and lower ears and deeper 

 byssal sinus. 



Pecten (Nodipecten) subnodosus Sowerby. 

 Pecten subnodosus "Shy ., P. Z. S., 1835, p. 109. 

 Pecten intermedins Conrad, Am. Journ. Conch., iii., p. 7, 1867. 



Pleistocene of Cerros Island and other points on the Lower Californian 

 coast. Living in the adjacent waters. 



There seems to be little reason for separating this form from the P. 

 fiodosus of the Antilles. Both vary through a strictly analogous series of 

 mutations. 



Pecten (Pecten) diegensis Dall. 

 Pecten floridics Hinds, Zool. Sulph. Voy., p. 60, pi. 17, fig. 6, 1844 ; not Ostrea ( = Pecten') 

 florida Gmelin, 1792. 



Pleistocene of San Diego; Hemphill. Living on the adjacent shores 

 from Monterey, California, southward. 



Pecten (Plagioctenium) ventricosus Sowerby. 

 Pecten iJentricosus Shy., Thes. Conch., Pecten, p. 51, pi. 12, figs. 18, 19, 1843. 

 Pecten tiimidiis Sby., P. Z. S., 1835, p. 109 ; not /-". tuinidns'Xmt. 1822, nor of Zieten, 1830. 

 Pecteii cirii/tan's Shy., ex parte, 1835; \- /'. iiua Orh., 1847. 

 1 ^= Pecten poiiiatia Val., Voy. Venus, pi. ig, fig. 3, 1835. 



