56 FLORIDA GEOLOGICAL SURVEY—NINTH ANNUAL REPORT. 
than 7 per cent, of the total length, while in the other bones it is 
about 9 per cent. Just what this means cannot now be determined. 
The measurements of the other two bones are not greatly different 
All of the fossil hinder cannon bones differ from those of 0 . virgin- 
ianus in having the outer of the two ridges which bound the hinder 
groove more prominent than the inner one. 
There are in the collection from station 19 a part of a right 
premaxilla containing the three premolars and a part of a left max¬ 
illa containing the three molars. Both have the numbers 6952. 
The molar teeth are somewhat more worn than the premolars, so 
that we must conclude that the two bones did not belong to the 
same individual. There is also a left ramus of a lower jaw, No. 
7765, nearly complete and containing all of the teeth. To the 
molars of this jaw the molars of the fragment of maxilla fit accu¬ 
rately. Both must have belonged to one individual. A comparison 
of these with jaws and teeth of 0 do coileus virginicmus and of 0. 
osceola yield to the observer no differences that seem to be constant. 
The following measurements of the teeth are furnished for future 
comparisons. The measurements of the teeth of a second complete 
left ramus, No. 6951, found at this same place, are included. 
MEASUREMENTS OF TEETH IN MILLIMETERS. 
Upper Teeth Lower Teeth 
No. 6952 No. 7765 No. 6951 
Length of line of premolars—1- 36 34 30 
Length of line of molars- 44-5 4& 5 1 
Length of pm2_ 12 10 8 
Width of pm2-- 11.2 5.3 5.2 
Length of pm3--- 11.2 11.5 10 
Width of pm3--— 12 7 6.8 
Length of pnH_ 11 12 11.1 
Width of pm4 --- 13 8.2 7.6 
Length of mi - 13 12 14 
Width of mi _ 13-5 10 9 
Length of m2 - 15 14 15 -5 
Width of m2 ___ 16 10 10 
Length of m3 _ 15 20 21 
Width of m3 --- 16 10 10 
Besides the differences shown in the measurements of the teeth 
of Nos. 7765 and 6951, the space between the rear of the symphysis 
and the front of the tooth row in the former is only 27 mm. long; 
