774 MAMMALIA. 
warm flesh. Most are bold and fierce animals, with keen 
senses and quick intelligence, and often much beauty of 
form and marking. 
Fic. 417.—Lower surface of dog’s skull. 
0.¢c., Occipital condyle; B.0., basioccipital ; 7., tympanic bulla; 
m.c., postglenoid process Behind fossa for condyle of mandible 3 
B.S., basisphenoid ; P.S., base of presphenoid ; /’., vomer 3 
Af.2, second molar; A/.1, "first molar ; 7.1-4, premolars, the 
4th the large carnassial; c., canine; /.1-3, incisors 
Parts, 
premaxilla; #x., maxilla; Pad., palatine; /., jugal; A.S. 
alisphenoid ; Pz., pterygoid ; Sq., squamosal (the reference line 
points to the glenoid fossa). 
Almost all have well-developed claws; there are never 
fewer than four toes. The teeth are always rooted, except 
in the case of the tusks of the walrus; the canines are 
