72 FLORIDA GEOLOGICAL SURVEY-SEVENTH ANNUAL REPORT. 
materials in the pebble phosphate conglomerate. While this is rec¬ 
ognized as a possible source of certain of the Miocene forms of the 
land pebble phosphate conglomerate, the study of the fauna has not 
progressed far enough to permit one to determine whether or not 
any considerable number of the fossils were so derived. 
FOSSILS CONTEMPORANEOUS WITH THE PHOSPHATE DEPOSITS. 
The fossils representing animals contemporaneous with the phos¬ 
phate deposits include both land and aquatic forms. The land ani¬ 
mals in the beds no doubt represent forms that were washed in from 
the nearby shore, or were carried in by streams, while the aquatic 
forms are those that inhabited the shallow waters in which the beds 
were accumulating. 
LAND FOSSILS OF THE PHOSPHATE BED. 
The land animals of the land pebble phosphate beds include 
mastodons., rhinoceroses, horses and land turtles. The mastodons 
found in this formation are not unlike the form described by Leidy 
from near Archer as Mastodon ( Trilophdon ) florid anus. The parts 
commonly found include teeth, vertebrae, broken ribs, and occasional 
leg bones. Skulls are seldom preserved. The mastodon teeth 
found in the deposits present considerable variation and it is prob¬ 
able that more than one species is represented. 
Rhinoceroses are found in this formation, two or more specie^ 
being present. According to Mr. James Gidley Teleoceras fossiger 
has been definitely identified by him from a tooth obtained from this 
formation near Mulberry.* On the other hand specimens represent¬ 
ing parts of the jaws and teeth presented to the Survey by the 
Amalmagated Phosphate Company are clearly distinct from T. fos¬ 
siger. 
^Statement before the Palaeontology Society, Dec., 1914. 
