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TERTIARY FAUNA OF FLORIDA 



sand bed; Claiborne, Lisbon, and Newton, Alabama, and at Caton's Bluff", 

 Conecuh River, Alabama. 



This is an excellent species with a few strong plications, making the 

 valves claw-like ; otherwise close to 0. thirsce. 



Ostrea (G-ryphseostrea) subeversa Conrad. 

 Gryphaostrca stibeversa Conr., Am. Joiirn. Conch., T, p. 15, 1865 ; Checkl. Inv. Fos. 



Eocene, p. 33, 1866. 

 Gryphostrca cvcrsa (Deshayes) Conr., Checkl. Inv. Fos. Eocene, p. 3, 1866. 

 Ostrea cvcrsa (Mellv.) Heilprin, Ann. Rep. U. S. Geol. Surv. for 1883, p. 310, pi. 64, 



figs. 5-8, 1884. 

 ? Gryphcea vomer Morton, Synops. Org. Rem., p. 54, pi. ix., fig. 5, 1834; nol in Journ. 



Acad. Nat. Sci. Phila., vi., pi. v., figs 1-3, 1828. 

 Cf. Ostrea lateralis Nilsson, Petr. Siiec, p. 29, pi. 7, figs. 7, 10, 1827, and Gryplicsa can- 

 aliculata Sby., Min, Conch., pi. 26, fig. i, 181 2 (as Chaiua). 



? Cretaceous of the lower Greensand and upward in New Jersey, espe- 

 cially near New Egypt. 



Eocene of Upper Marlboro', Maryland, Conrad; Jacksonian Eocene of 

 Fail Post-Office, and the Zeuglodon bed at Cocoa Post-Office, Choctaw 

 County, Alabama. 



This species is worth more thorough study by some one familiar with 

 the Cretaceous forms of both Europe and America. Its relations are merely 

 indicated by the above synonymy. 



Ostrea trigonalis Conrad. 

 Ostrea trigonalis Conr., Proc. Acad. Nat. Sci. Phila., vii., p. 259, 1855 ; Wailes, Geol. 



Miss., p. 289, pi. xiv., fig. 10 (bad), 1854; Lesueur, Walnut Hills Fos., pi. 4, fig. 



17, pi. 5, fig. I, 1829. 

 ? O. Attwoodii, Gabb, Pal. Cal., ii., pp. 33, 106, pi. 10, fig. 58, pi. 11, fig. 58^, 1869. 

 ? O. subjccta Conr., Pac. R. R. Rep., vii., pt. i, p. 193, pi. 2, fig. 3, 1857. (Young shell.) 



Upper (Jacksonian) Eocene of Jackson, Mississippi ; Fail Post-Office and 

 Cocoa Post-Office, Choctaw County, Alabama; Turks Cave, Alabama; Hinds 

 County, Mississippi; Creole Bluff, Grant Parish, Louisiana. 



Lower Oligocene (Vicksburgian) of Vicksburg, Mississippi; Upper Oli- 

 gocene of White Beach, Little Sarasota Bay, Florida, and Oak Grove, Santa 

 Rosa County, Florida. 



Miocene of Greensboro', Choptank River, Maryland ; Edgecombe 

 County, North Carolina. 



