1885.] The Amblypoda. 51 
tebrz, the length of the neck cannot be determined. It may have 
been short, as in the LFodasileus pressicornis, or longer, as in the 
species of Uintatherium. The indications derived from the bones 
of the muzzle point to the attachment of a heavy upper lip. The 
numerous rugosities of the posttympanic and mastoid regions 
indicate the insertions of strong muscles. Some of these may 
have been adductors of large external ears. 
Fic. 33.— Ui ntatherium EPEE Marsh, skull, one-eighth. nat. size; upper figure 
from front, lower figure from above. From Bri ridger Eocene of Wyomi ng. From 
Marsh, Amer. Jour. Sci. Arts, Xi, Pl. 11. 
The inferior incisor teeth have no adaptation for cutting off 
vegetation. The mental foramen is small, but the small nutrient 
artery thus indicated is not adverse to belief in a prehensile under 
lip to make up for the uselessness of the teeth. The projecting 
regions would prevent short lips from touching the ground. 
