TRANSACTIONS OF WAGNER 

 1506 



TERTIARY FAUNA OF FLORIDA 



tropical vegetation, with carbon dioxide. Hence, the absence of erosion and 

 denudation in the ordinary sense, and the reduction of beds of marl and lime- 

 stone, in one case two hundred feet or more in thickness, to a relatively thin 

 stratum of residual silicious gravel. Throughout the history of the peninsula 

 the debris of one formation has formed the basis of another to a greater or less 

 extent, and the fundamental source of the whole has been the marine organic 

 sediments of the Peninsular limestone, carrying also organic silica and more 

 or less clay dust and oxide of manganese, derived from the sea. Since the 

 Glacial period the coastwise drift due to prevailing winds has added much silica, 

 chiefly in the form of beach sand, and the pumice of the West Indian volcanoes 

 drifted by ocean currents has added no insignificant contribution of mineral 

 matter to the shores. The action of coral reefs and accumulated sediments near 

 the southern margin of the peninsula, as described by Louis Agassiz, has had 

 some effect in enlarging the area of land, but much less than was at first sup- 

 posed. 



LIST OF SPECIES OF THE FLORIDIAN MIOCENE. 



The beds of true Miocene in Florida are so very uniform that practically only one 

 phase is presented and the fauna can be considered as from a single horizon. The lo- 

 calities from which the species have been obtained are indicated by letters following the 

 name for the several localities as follows. A, upper bed at Alum Bluff and adjacent 

 outcrops ; J, Jackson Bluff southeast of Tallahassee ; D, De Leon Springs ; K, vicinity 

 of Jacksonville ; L, Long Key ; C, Coe's Mill ; F, artesian well at Fort Worth ; W, 

 Walton County, Florida. 



The asterisk indicates that the species is believed to survive to the recent fauna. 



*Tornatina canaliculata Say, A. Scaphella Trenholmi Tuomey and Holmes, 

 *Terebra protexta Conrad, A. A. 



Conus adversarius Conrad, A. Turbinella sp., near polygonata Heilprin, 

 Drillia (Cymatosyrinx) lunata H. C. Lea, A. 



A. Mitra Willcoxii Dall, A. 



*Drillia ostrearum Stearns, A. Fasciolaria rhomboidea Rogers, A. 



*Drillia aepynota var. acila Dall, A. Fasciolaria Sparrowi Emmons, A. 



Drillia distans Conrad, A. Busycon scalarispira Conrad, A. 



Drillia pusilla Ravenel, A. Busycon var. incile Conrad, A. 



Drillia gracilina Dall n. sp., A. Busycon var. sepynotum Dall, A. 



Drillia, like hoplophorus Dall, A. Busycon maximum Conrad, A. 



Cancellaria carolinensis Emmons, A. Busycon var. tudiculatum Dall, A. 



*Oliva literata Lamarck, var.? A. Solenosteira Vaughani Dall, J. 



*Olivella mutica Say, A. Ecphora quadricostata Say, A, L. 



