94 FLORIDA GEOLOGICAL SURVEY - EIGHTH ANNUAL REPORT. 
same as that of the Alachua clays, and it now seems that the 
Alachua clays and the Dunnellon formation are not separable, the 
former representing' a local phase of the latter. The Alachua clays 
being, however, the older term it has been suggested that the depos¬ 
its as a whole be known as the Alachua formation. (Sellards, 1914, 
p. 162). 
The vertebrate fossils obtained from the Alachua clays include 
two rhinoceroses identified by Leidy and Lucas as Teleoceras fos- 
sigcr var. proteins and Aphelops malacorhinus; one mastodon, M. 
( Trilopliodon ) floridanus; two hipparions, H. ingemium and H. 
plicatile; and three species of camel originally referred 
by Leidy to Anchenia but subsequently identified as Pro- 
camclus, namely P. major, P. me dins and P. minor. In addition 
Leidy reports from the deposit a tapir, a deer, Odocoileus, Mega¬ 
therium, a crocodile or alligator, fragments of shell of Emys, scales 
of garfish and bones of teleosts*. 
The vertebrate fossils obtained from the Dunnellon formation 
include Aphelops malacorhinus, Mastodon ( Trilopliodon) floridan- 
ns, two or more species of Hipparion, a camel, Procamelus minor, 
Mcgalonyx, Ursns, Felis, Odocoileus and Parahippus. 
At Newberry in Alachua County a tooth of a horse has been 
obtained which Dr. Hay regards as the third left lower molar of 
Equus litoralis. From this locality also the writer has secured a 
number of teeth which appear to pertain to the genus Odocoileus. 
At Neals near Newberry a tooth has been collected, which probably 
represents a milk molar of Tapirus terrestris. These were taken in 
connection with mining phosphate rock which is found in beds of 
lower Pliocene age. It is quite possible that these more recent fos¬ 
sils have been included in the Pliocene bed owing to sinkhole for¬ 
mation, the associated fossils being chiefly those of lower Pliocene 
age. Tapirus is likewise reported by Leidy from the vicinity of 
Archer but evidence is lacking to show the actual association of 
the specimen with the Pliocene fossils of that locality. As a result 
of underground solution in the limestone rock which underlies the 
hard rock phosphate deposits, sinkhole formation has been active 
in this region, and has notably affected the surface topography. 
* Hipparion (Hippotherium) princeps (Leidy) has been reported from the 
Alachua clays but the specimen on which the species was based was taken by 
Mr. Willcox from Peace Creek. (Personal letter, October, 1914.) 
