I 5 88 



TRANSACTIONS OF WAGNER 



TERTIARY FAUNA OF FLORIDA 



Haplostiche Soldanii P. and J. 

 Textttlaria Barrettii J. and P. 

 Textularia trochus Orb. 

 Orbiculina adunca F. and M. 

 Orbiculina compressa Orb. 

 Cristellaria cultrata Montf. 

 Cristellaria cassis F. and M. 

 Cristellaria calcar L. 



Gypsina globulus Reuss. 

 Gypsina vesicularis P. and J. 

 Cuneolina pavonia Orb. 

 Cuneolina sp. nov?. 

 Vaginulina legumen L. 

 Nummulites Ramondi d'Arch. 

 Amphistegina Lessonii Orb. 



THE OAK GROVE SANDS. 



At the village of Oak Grove, Santa Rosa County, Florida, Mr. L. C. John- 

 son discovered a sandy stratum containing fossils, some of which were sub- 

 mitted to the writer by Professor E. A. Smith. Subsequent exploration by 

 Mr. Frank Burns, of the United States Geological Survey, resulted in pro- 

 curing a fairly good representation of the fauna of these beds. The fossils are 

 well preserved as regards their form, but are very soft and require hardening 

 before they can be transported. This is done by dipping them repeatedly into 

 a very dilute solution of white shellac in alcohol, which is absorbed and dries 

 in a few moments without leaving any perceptible coating on the outside of the 

 specimens. 



The presence of a peculiar Turrit ella (T. alcida Dall) in both the Alum 

 Bluff sands and those of Oak Grove, together with Ostrea trigonalis, Pecten 

 Sayanus, and a Pododesmus, led to the belief that the two may be referred to 

 a single horizon. If this is not the case, they must at least be very nearly of 

 the same age. The deposit at Rock Bluff, with which that at Alum Bluff is 

 apparently continuous, is an oyster-bed, on which only a few species could be 

 expected ; that at Oak Grove is an ordinary sea-bottom deposit. The grayish 

 or greenish tint of the sand contrasts strongly with the yellowish tinge of the 

 Chattahoochee or Chipola horizons, and points the way transitionally to the 

 Miocene marls above, in which a grayish color is almost constant. 



The influence of the conditions which brought on the Miocene is further 

 shown by the appearance in the fauna of a large Lyropecten and other analo- 

 gous species. 



The Burns collection of Oak Grove fossils came to hand after Parts I. and 

 II. were practically completed, and so in the text of this Memoir a complete 

 account of the gastropod fauna has not been given, though the pelecypods were 

 taken in hand with the others. In the following list, however, it has been 

 attempted to include all the species, at least so far as to give their generic names 



