TRANSACTIONS OF WAGNER 

 1558 



TERTIARY FAUNA OF FLORIDA 



Pitaria astartiformis Conrad, M, V, Chi- Nummulites Raimondi Defrance, O, Ala- 



pola. bama. 



Corbula sp., M. Nummulites variolaria Lamarck, O. 



Fistularia ocalana Dall, O. Orbitoides Mantelli Morton, O, V, M. 



Orbitoides dispansus Sowerby, O, M, 



Nummulites Willcoxi Heilprin, O, M, Georgia. 



Georgia,* Alabama. Orbitoides sella D'Archiac, O. 



Nummulites floridensis Heilprin, O, M, Orbitoides papyraceus Boubee, M, Geor- 



Georgia, Alabama. gia. 

 Nummulites Heilprini Hantken, O. 



The total is about fifty-nine species, of which about twenty-five appear to be peculiar, 

 fifteen are inherited from the Vicksburgian, and eleven persist as far as the silex beds 

 of Tampa. Two Ocala species are present in the Eocene, four as far up as the Chipola, 

 one reaches the Miocene, and one survives to the present day. If the whole fauna were 

 known, doubtless a larger number would be noted as surviving. Hardly any of the smaller 

 species which predominate among survivors from one horizon to another, and which, of 

 course, existed, are among those collected. 



The tough limestone replete with Miliolid foraminifera found by Professor Heilprin 

 at Wheeler's, on the Homosassa River, a few miles from the typical nummulitic beds, is 

 probably, as he seemed to infer, a special local phase of the Ocala limestone rather than 

 a deposit of a distinct period of sedimentation. 



THE CHATTAHOOCHEE GROUP. 



In 1887 Mr. D. W. Langdon, while making geological observations on the 

 Chattahoochee River, noted above the white Orbitoidal limestone a rock more 

 argillaceous and silicious which appears at Rock Bluff, at points near Ocheesee 

 Landing, two miles above, and in a railway cutting about half a mile east of 

 the river at the railway bridge over the Chattahoochee River at New Chatta- 

 hoochee Landing.f The latter may be regarded as the typical locality, as sug- 

 gested by Mr. Langdon (op. tit., p. 444), who proposed for this argillaceous 

 limestone (which he states contained a Pecten and an oyster resembling O. 

 virginica} the name of the Chattahoochee Group, or limestone. He also sup- 

 plied a section of the strata at Ocheesee, where this limestone, without fossils, 

 has a thickness of ten feet above five feet of the Orbitoidal limestone. 



* The Georgia localities are near Bainbridge. 



t See observations by Langdon in Am. Journ. Sci., 3d Ser., xxxviii., p. 324, 1889; 

 also in Report on the Geology of the Coastal Plain of Alabama by E. A. Smith, State 

 Geologist, pp. 374-6, 444, 1804. 



