PLATE CXXII 



Skull, Jaw, and Teeth of Allops ceassicobnis? seu marshi 



A\ Skull, right side; A^, right upper dentition; B', lower jaw, inner view of left half; B^, lower dentition, crown view. Figures of 

 skull one-fifth natural size; figures of teeth one-half natural size. (See p. 508.) 



British Mus. 5743M, female skuU and jaws referred to Allops crassicnrnis? , one individual. The premolar pattern is essentially 

 identical with that of the type A. crassicornis, although the resemblance is obscured by the greater wear, which makes the 

 internal cusps appear more circular in the present specimen. The small horns, slender zygomata, and rather small canines 

 imply female sex. The horns are very different from those of the male Allops, but so also are those of the supposed female 

 of A. serotinus. The evidence offered by the premolars seems to justify the reference of this skull to an advanced stage of 

 Allops. 



In the side view of the skull the tapering nasals suggest reference to a small species of Bronlotherium, and this idea is at first rein- 

 forced by the general appearance of the premolars, which have large circular postero-internal cusps. But reference to Bronto- 

 iherium is excluded by the presence of sharp external and internal cingula on the premolars, by the narrowness of the molars^ 

 and by the depth of the jaw in the region of the symphysis. 



This specimen is important on account of its association with a lower jaw and with a considerable part of the skeleton. (See p. 680.) 



