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679 



TERTIARY FAUNA OF FLORIDA 



O. pincerna Lea, op. cit., p. 92, pi. 3, fig'. 73, 1833. (Misprinted //V/ftv-rt, princcnia, and 



pincema in various works.) 

 O. cretacca Morton (ex parte), Syn. Org. Rem., p. 52, pi. 19, fig. 3, 1834. 

 O. c/aiiornensis (Com-. MS.), Harris, Bull. Pal., i., pp. 3, 11, 1895. 

 ? O. scmihinata Lea, Contr. Geol., p. 90, pi. 3, fig. 69, 1833. 



Eocene of Claiborne and Gosport, Alabama ; Oligocene of Vicksburg, 

 Mississippi, and perhaps of Florida and California. 



The reason why the name scinilitiiata was not originally adopted for the 

 synonymous oysters of Lea was partly on account of a suspicion that the 

 type of sonibinata was a worn, immature specimen of sellafonnis, and partly 

 because the name is less appropriate. There is no reason why the original 

 decision should be changed at present. 



The 0. alabamiensis, when its outer layer is preserved, shows, as noted 

 by Cossmann, fine radial grooving, which is usually lost with the thin dehis- 

 cent coating referred to. The species which is here termed 0. viaiiriciciisis 

 would form a direct continuation of the line of the alabamiensis, and it is not 

 impossible that they should be specifically united, but I have never been able 

 to obtain an absolutely complete specimen of Gabb's shell, so as to see if 

 the prismatic layer agreed. From majiricieiisis to virginica the gap is hardly 

 noticeable. The Californian oyster which has been called 0. Tayloriaiia Gabb 

 is suspiciously close to the present series. 



Ostrea compressirostra Say. 

 O. compressirostra Say, Journ. Acad. Nat. Sci. Phila., iv., p. 132, pi. viii., fig. 2, 1S24. 

 Gryphaa mutabilis Morton, Journ. Acad. Nat. Sci. Phila., vi., p. 81, pi. iv., fig. 3, 1S28 ; 



Synops. Org. Rem., p. 53, pi. iv., fig. 3, 1834. 

 O. simiosa Rogers, Trans. Am. Phil. Soc, N. S., v., p. 340, 1831, and vi., pi. xxvii., 



fig. I, 1839. 

 O. disparilis Conr. , Medial Tert., p. 51, pi. 26, 1840. 

 O. Tiiomeyi Conr., Proc. Acad. Nat. Sci., ix., p. 1S4, 1865 (not of Cocpiand, 1869, Mon. 



Ostr., p. 68). 

 ? O. pandiformis Aldr., Journ. Cin. Soc. Nat. Hist., p. 79, 1887, as of Gabb, Proc. Acad. 



Nat. Sci. Phila. for 1861, p. 328, 1862. 

 O. Ravencliaiia Tuomey and Holmes, Pleioc. Fos. S. C, p. 21, pi. 6, fig. i, 1855 ; Conr., 



Proc. Acad. Nat. Sci. Phila. for 1863, p. 582. 

 O. bellovacina Conr., Bull. Nat. Inst., ii., p. 172, 1842, not of Lamarck. 



Eocene : of Piscataway Creek, Upper Marlboro, and Leland, Prince 

 George County, Maryland ; lower bed Aquia Creek, of Evergreen, Gloster 

 City, City Point, and Coggins Point, Virginia ; also on the Eastern Shore of 



