TESTUDINATA. 
49 
plastron of the type, while not twice as wide as the bone here de¬ 
scribed, is nearly five times as thick. The entoplastron of that 
species has likewise a different shape; and the gulars seem to have 
occupied more of its anterior end. The bone cannot belong to T. 
ocalana; because in this species, as usual, the pectorals do not in¬ 
fringe on the entoplastron. 
TESTUDO SELLARDSl, NEW SPECIES. 
Plate 8, figs. 6-8. 
Type-specimen. —A part of the xiphiplastron,' accompanied by 
parts of the carapace, of a large tortoise, No. 1831 of the Geolog¬ 
ical Survey of Florida. 
Type-locality and formation. —Vero, St. Lucie county, Florida. 
Pleistocene. 
Diagnosis. —In size and structure resembling T. crassiscutata, 
but having the outer face of the anterior part of the thickened 
xiphiplastral border flat or concave, instead of convex; the thick¬ 
ness of the anterior end of the border contained in the distance 
to the bottom of the xiphiplastral notch 3.6 times, instead of 3 
times. 
In the paleontological collection at Tallahassee are various re¬ 
mains of this species regarded as hitherto undescribed. They were 
obtained in the canal of the Indian River Farms Company, near 
Vero, St. Lucie county, south of the Florida East Coast Railway. 
The fragments have the number 1831. As far as possible the frag¬ 
ments have been brought together. It is found that there are pres-’ 
ent a part of the second, neural plate and all of the fourth, most 
of the fifth and all of the sixth, seventh and eighth; also the prox¬ 
imal ends of the right fourth, fifth, and seventh costals; and of 
the left fifth and seventh; also various other fragments of costals; 
also the left side of the xiphiplastron. These parts indicate a very 
large animal. Some of them are represented by figures 6-8 of 
plate 8. 
The following are the dimensions of the neurals measured, the 
length being taken at the middle, the width where greatest, and 
the thickness at the middle of the costal border. 
