OF THE CANIDH AND URSIDA. 921 
bristles, is set unusually high, nearly on a level with the posterior 
canthus of the eye. 
Text-figure 5. 
Cerdocyon microtis. 
A. Right fore foot. C. Rhinarium from the front. 
B. Right hind foot. D. Rhinarium from the side. 
Points to be noticed in connection with this species, apart from 
the remarkably small size of the ears, which are only 27 inches 
(56 mm.) long *, are the comparatively wide and nearly even 
spacing of the digital pads when stretched, the very small size of 
the carpal and pollical pads, the depth of the rhinarium below 
the nostrils in front, and the high position of the superior genal 
vibrisse. 
* Most of the South American dogs have the ears as long relatively as in typical 
foxes (Vulpes vulpes), which about equal Cerdocyon microtis im size and have a skull 
of about the same length. But, according to Miller, the ears of V. vulpes range from 
82 to 98 mm. 
The czecum in this example of C. microtis was short and uncoiled as recorded by 
Garrod of C. cancrivorus (= C. thous), and there is very little doubt that these 
two species are tolerably closely related. On the other hand, in the specimen of 
Ps. gracilis from Cordova and in an example of Ps. azaricus from Mar del Plata, the 
cecum was longer and coiled, as described by Garrod of C. antarcticus. There are 
discrepancies in the accounts of the cecum of C. azare, Mivart stating it to be 
straight and Garrod stating it to be coiled. The name azare, however, has been 
given to at least two distinct species, one belonging to the thous- or cancrivorus- 
group and another to the culpeus-group of South American dogs (see Thomas, Amn. 
Mag. Nat. Hist. (8) vol. xiii. p. 345, 1914). No doubt, Mivart and Garrod had 
different species under examination, and that Mivart’s determination was probably 
correct may be surmised from the fact that true azar belongs to the thous-group. 
