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Show 1880.] t>ENTAL CHARACTERS OF THE CANIDAE. 243 C. vulpes. C. azarce. Length of the ramus of the mandible ) in a straight line from symphysis I 109 105 to condyle I [In tliis and the following tables of measurements " total length " means the distance from the front edge of the prcemaxillary bones to the extremity of the occipital spine. The " 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 prasmaxillary 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 ^L- and - meet. The " length of the basicranial axis" has already been defined. The measurements are given in millimetres.] The differences in the dentition between C. vulpes and G. azaree are very slight. In the upper jaw of the Fox the series of the Fig. 3. The crowns of the cheek teeth of C. azarce (A) and C. vulpes (B). Natural size. A, A', right upper and lower teeth of C. azarce; B, B', the same of C. vulpes; a, b, " cuspdine " 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 G. azaree 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. |