ARTIODAOTTLA. 
333 
Length (axial) to the end of the true molars ... 
Length (axial) to the palatal notch. 
Length (axial) to the end of the nareal fossa .... 
Length (axial) to the hasioccipital. .. 
Length (axial) to the occipital condyles. 
Width at the external incisors.. 
Width at the posterior diastema.. 
Width between the extremities of the last molars 
Width of the nareal fossa behind. 
Width between the otic bullje interiorly-— 
Width between the same exteriorly. 
Width of the occipital condyles. . 
Width of the foramen magnum.. 
Width of the external nares.. 
Width of the bridge of the nose at the middle. . 
Width of the front between the orbits. 
Width between the zygomata. 
Width of the brain-case... 
Width of the occiput . 
Length of the first true molar. 
Width of the same. 
Length of the second true molar. 
Width of the same.. 
0. 202 
0.196 
0. 233 
0. 255 
0. 282 
0. 028 
0.015 
0. 060 
0.031 
0.025 
0. 075 
0. 045 
0. 020 
0. 023 
0.020 
0. 090 
0.117 
0. 061 
0. 069 
0 . 0220 
0. 0165 
0. 0310 
0. 0165 
Of vertebrcR, there were obtained a number of cervicals, dorsals, and 
lumbars. The cervicals are, as in other Camelidcd^ disproportionately large, 
and display the typical character of the group in the absence of the verte¬ 
bral canal. The atlas is rather short, and the transverse processes not 
much expanded laterally. They commence in front at the edge of the 
occipital cotylus, and expand backward, extending half an inch outward 
from, and an equal distance posterior to, the face for the axis. The ante¬ 
rior border has four notches, two larger and two smaller. The latter are 
lateral, and divide the occipital cotyli for half their depth. Of the former, 
the inferior is the wider, and does not separate the cotylar surfaces, which 
the superior notch does. The neural canal is anteriorly depressed, posteri¬ 
orly round. The vertebral foramen enters at the superior base of the 
transverse process, and reappears on the inferior side at the posterior end 
of a fossa. At the anterior end of this fossa, it again pierces the neura- 
pophysis, entering the neural canal, just behind the cotylar surface, on the 
upper side of the canal. At the point of exit, it also pierces the superior 
wall of the canal. There is no tuberculum atlantis, nor neural spine. The 
