418 CHARACTERS OF FOXES CHAP. 
the Dogs belonging to genera that have already been separated 
off. Thus Zycaon is distinctly Thooid. The characters in 
question are these:—JIn the Fox series, the frontal air-sinus of 
the Thooids is absent; the cranial cavity is pear-shaped, without 
an abrupt angle coinciding with the supra-orbital sulcus, such as 
exists In the other group; the coronoid process of the mandible 
is rather higher and more turned back in the Foxes, while the 
depth of the mandible at the level of the first molar is greater. 
Fic. 209. 
Japanese Wolf. Canis hodophylax. «4. (From Nature.) 
To the Fox series belong among others the species C. lagopus 
(Arctic Fox), C. zerda (the Fennec), C. chama (the Silver-backed 
Fox of Africa), C. virginianus (the Virginian Fox), C. velox (the 
Kit Fox), and of course the Common Fox of this country. On 
the other hand, the Dogs proper (such as C. dingo), the Wolves 
(C. lupus, C. pallipes, C. niger), the Japanese Wolf (C. hodophylaz), 
the Red Wolf of America (C. jubatus), the Jackals (C. aureus, C. 
anthus, ete.), the Prairie Wolf (C. /atrans), and a number of 
American forms, such as C. azarae, its close ally C. cancrivorus 
(=C. rudis), C. antarcticus, C. magellanicus, ete., are decidedly 
Wolves rather than Foxes. 
= = 
