1880.] 



DENTAL CHARACTERS OF THE CANID-3E. 



243 



Length of the ramus of the mandible 

 in a straight line from symphysis 

 to condyle 



vulpes. 

 109 



C. azarcB. 

 105 



[lu this and the followiug tables of measurements " total length " means the 

 distance from the front edge of the prtemaxillary bones to the extremity of the 

 occipital spine. Tlie '■ zygomatic width" is the greatest transverse distance 

 between the outer faces of the zygomatic arches. The " length of the bony 

 palate " is measured from the front edge of the symphysis of the prffimasillary 

 bones to the hinder edge of the middle of the bony palate, not taking into 

 account the inconstant median spine which is frequently developed. The 

 " width of the bony palate " is the distance between the points at which the 



outer faces of ^— ^ — and -^— meet. The " length of the basicranial axis" has 



already been defined. The measm-ements are given in millimetres.] 



The differences in the dentition between C. vulpes and C. azarce 

 are very slight. In the upper jaw of the Fox the series of the 



Fig. 3. 



The crowns of the cheek teeth of C. asarm (A) and C. vulpes (B). Natural size. 



A, A', right upper and lower teeth of C. asarcB ; B, B', the same of 

 C. vulpes ; a, h, " cusp-line " traversing the apices of the inner and 



outer anterior cusps of — j. 



molar teeth of opposite sides slightly incline towards the middle 

 line behind, while in 0. azarce they are almost parallel. Hence 

 the angulation of the line of the cheek-teeth between the last prae- 

 molar and the first molar (fig. 3, A, B) is rather more marked in 

 C. vulpes. 



