62 THE DOG’S SKULE. 
jects greatly outwards in the Phocrde ; but it is not 
the median inferior part of the lip, as in the Bears ; 
but posteriorly, as in the Otters. It is not prolonged 
outwards in the Ofarzzde and Trichechide. 
3. The paroccipital process is more or less tri- 
angular, and directed outwards, downwards, and back- 
wards, except in Zvzchechus, where it forms a small 
buttress against, and uniting with, the hinder side of 
the great mastoid. 
4. The mastoid process may be considerably 
prominent (as in Ofaria), or extremely so (as in 777- 
chechus), or may form part of a wide-spread rounded 
prominence (as in the Phocid@). It may form a 
continuous bone wall with the paroccipital process (as 
in Otaria), or be separated from it (as in the Phoczde), 
or blend with it (as in 77zchechus). 
5. The carotid foramen is always large and con- 
spicuous; and is placed towards, or almost at the 
hinder end of, the bulla, which the carotid canal 
traverses, towards or along its inner margin — its 
course being indicated externally in Ofaria and 771- 
chechus, but not at all in the Phoczde. It is never con- 
cealed (as it is in the Bears) by a projecting lip of the 
basi-occipital. 
6. The condyloid foramen is always distinct and 
exposed, and never overlapped by a ridge of bone 
running from the paroccipital process of the condyle ; 
and never opens into, though it appears sometimes to 
