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TERTIARY FAUNA OF FLORIDA "^" 



Miocene of Maryland, Virginia, and North Carolina, Say and Conrad; 

 near Darlington, South Carolina, at various points near and at the Natural 

 Well, Duplin County, North Carolina ; Petersburg, Dinwiddie, York River, 

 and borders of the Dismal Swamp, Virginia, and Choptanlc, Maryland, Harris, 

 Burns, and others. 



There can be no doubt that Conrad's N. protexta is identical with A. 

 incilc. 



This species has not yet turned up in the Floridian Miocene, but a 

 knowledge of it is necessary to discriminate between the species of Noetia. 



Area (Noetia) ponderosa Say. 

 Area ponderosa Say, Jouni. Acad. Nat. Sci. Phila., ist Ser., ii., p. 267, 1822. Recent 



in Florida. 

 Area eontraria Reeve, Conch. Icon., Area, pi. 8, fig. 55, 1844. 

 Area elegans, Phil. Zeitschr. Mai., 1847, p. 92. 

 Area ponderosa Tryon, Am. Mar. Conch., p. 178, pi. 36, figs. 467-8, 1874. 



Pleistocene of Cape May and Atlantic City, New Jersey ; of Maryland, 

 near Cornfield Harbor, at Wailes Bluff, on the Potomac River; of Simmons 

 Bluff, South Carolina ; and many points on the coast of Florida ; recent on 

 the eastern coasts of North America from Cape Cod to Yucatan. 



This is the type of the subgenus. In this species the beaks are more 

 nearly in the middle of the shell than in either of the others. The ligament 

 does not occupy the whole of the cardinal area, and the greater portion of it 

 is in front of the beaks and strongly transversely striated. The borders of 

 the adductor scars are sometimes marked by an elevated ridge as strong as in 

 many Cuculljeas. 



It is curious that Conrad should state (Proc. Acad. Nat. Sci., 1862, p. 290) 

 that he had not seen a recent specimen of this species, and that he supposed 

 it to be extinct. It is probable that he was thinking of A. liciiosa Say when 

 he recorded these remarks, as the present species is almost the commonest 

 recent species of our shores. There can be little or no doubt that the names 

 of Reeve and Philippi are based on young specimens of this somewhat 

 variable shell. 



Subgenus SCAPHARCA Gray. 



Section Ciinearca Dall. 



Scapharca (Cunearcaj cumanensis Dall. 



Area inc07igrua Guppy, Proc. Sci. Assoc, Trinidad, p. 163, Dec, 1867 ; Geol. Mag., 



Dec, 1874, p. 451 ; not of Say. 



