216 
COEYPHODO^. 
latidens, and the superior exhibits a large pulp-cavity. The enamel-face 
extends high up on the posterior face. 
Measurements. 
M. 
Total length of the jaw from the angle to the incisive alveolar border.. 0.306 
Depth of the ramus at the third pi’emolar. 0. 063 
Depth of the ramus just behind the last molar.. 0. 035 
Diameter of the ramus at the last Tuolar. . 0. 035 
Elevation of the coronoid process.. 0.160 
Width of the condyle..... 0. 080 
Length of the dental series... 0.156 
Length of the true molars. 0. 080 
Length of the penultimate molar. . .. 0. 030 
Width of the same....... . 0.027 
Length of the last molar. 0. 0335 
Width of the same . . . . 0. 0260 
Diameter of the canines at the base... . 0. 032 
Width between the bases of the canines. 0. 053 
Length of the crown of the canines. 0.063 
Length of the superior canine preserved. 0.135 
Length of the crown of the superior canine. . 0. 093 
Long diameter of the crown at the base.... 0.031 
Antero-posterior diameter of the crown at the base ... 0.024 
The lower jaw and portion of the upper jaw above described were 
found in the normal immediate relation in the closed mouth. Immediately 
below the skull was found a humerus distorted by pressure, and, in close 
proximity, an atlas, parts of sternum, ribs, and other elements. The atlas, 
sternal segments, and ribs afford some distinctive characters. 
The atlas is short, and the lateral facets for the axis are moderately 
oblique, with a backward slope. The anterior cotyli are deep, and with 
nearly vertical long axes. The inferior face is without tubercle, and its 
posterior border is convex, the anterior concave. The neurapophyses 
are steep, and there is a short, obtuse, neural spine. The antero-posterior 
extent of the transverse processes is small, as its anterior base is much 
behind the middle of the longitudinal diameter of the atlas. It is jiierced 
by the vertebral foramen from behind, above the facet of the axis down¬ 
ward; the foramen issuing in the middle of the wide anterior face of the 
process. The usual foramen pierces the neural arch above and within the 
cotylus. 
