274 PROF. HUXLEY ON THE CRANIAL AND [Apr. 6, 



I. II. III. IV. 



Length of basicranial axis 39 ... 39 41 



P^^ 9-7 10 10 11 



^ 8 8 8-5 9 



Breadth , 8-2 8-6 ... 9 



Lengthof^ 5 5 5 5 



Breadth „ 6 6 ... 6 



liengthof 11 12 12 12 



m. 1 



6 6 6 6-5 



511. 2 



_ 3 ... ... 3 



m. 3 



This is made manifest by the comparison of the measnrements of 

 the skulls I., II., III., IV. in the preceding Table (of which No. ii. is 

 from " North China," while the rest are Japanese) with those of 

 Cants azarte (a) given in Table XIII. 



Nos. I. and ii. are adult skulls having a narrow lyrate sagittal 

 area, and curiously similar to Otocyon m the elongation of the jaws 

 and the marked lobation of the mandible. The outer incisor above 

 is separated from the others by a distinct interval ; and the bony 

 palate extends for 2-5 millims. behind the level of the hindermost 

 molars. No. iii. is young, the permanent teeth not having com- 

 pletely emerged. 



The Japanese G. hocloi)hylax, of which there is a fine specimen 

 now living in the Gardens, appears to be simply a small form of 

 Wolf; but in the absence of any accessible skulls of this form or of 

 C. nippon, I refrain from giving any definite opinion about them. 

 All the Asiatic Thooids, north of the Altai, appear to be mere 

 varieties of C. lupus. But in the Altai range itself, in the upper 

 basius of the Jenessei and the Lena, and as far eastward as the shores 

 of the Sea of Ochotsk the Catiis alpinus makes its appearance 

 (Schrenck, I. c. pp. 48-50). 



This species, C.primcevus, C.dukhunensis, and C. sumatrensis\\&\e 

 been separated as a distinct genus, Cyon (Cuon, Hodgson), on account 



of the constant absence of ;j^^. They agree, not only in this respect ^, 



but in the breadth of the jaws and, very generally, in a marked 

 convexity of the facial line. In this respect they depart from the 

 ordinary Wolves and Jackals in the opposite direction to some 

 Wolves and to the majority of the domestic Dogs, in which this 

 contour tends to become strongly concave. 



The following Table of the measurements of nine skulls shows the 

 close affinity of the forms associated under Cyon : — 



'■ Van der Hoeven {I. c.) mentions that he found ^pg present in one Bpecimen 

 of C. rutilans out of six examined. 



