FOSSILS FROM THE RIVER PEBBLE AND OTHER 
PLEISTOCENE DEPOSITS AND FROM THE LAND 
PEBBLE PHOSPHATE DEPOSITS. 
HORSES. 
Fig. 40.— Equus, first or second right upper molar. Dredged from the Schil- 
mann & Bene- river mine on the Withlacoochee River. Fla. Geol. Surv. collec¬ 
tion No. 1444. Twice natural size. Width of the grinding surface of the tooth, 
IS mm. 
Fig. 41.— Equus, second left lower premolar. From Vero. Fla. Geol. Surv. 
collection No. 1798. Slightly less than twice natural size. The grinding surface 
of the tooth measures 24 by 25 mm. 
Fig. 42.— Equus, first left upper molar. From Vero. Fla. Geol. Surv. col¬ 
lection No. 1800. Slightly enlarged. Grinding surface of the tooth measures 
30 by 28 mm. 
Fig. 43.— Equus, left lower molar or premolar. From Vero. Fla. Geol. 
Surv. collection No. 1752. Enlarged times 1V2. Grinding surface of the tooth 
28 by 15 mm. 
Fig. 44.— Hipparion. From pit of Prairie Pebble Phosphate Company, Mul¬ 
berry. Fla. Geol. Surv. collection No. 4557. Enlarged. Grinding surface of the 
tooth measures 19 by 16 mm. Specimen contributed by the Cason Brothers, Mul¬ 
berry, Florida. 
The horses found in the land pebble phosphate deposits (Bone 
Valley formation) belong to the genus Hipparion. In the river 
pebble deposits the teeth of both Hipparion and Equus are frequent¬ 
ly found. It is not probable, however, that these horses were con¬ 
temporaneous in Florida, the Hipparion teeth having with little 
doubt been washed into the river pebble deposits from an older for¬ 
mation. 
110 
