BY C. W. DE VIS. 447 



exclusive of the posterior cusp of m'^ ; in this example 7n'^ has a 

 very small inner cusp ; the length of m'^ is 12*7, its breadth 10*5. 

 This specimen appears to have been derived from a small and 

 aged female (Gowrie Creek). A fragment (Cat, No. 12,031) 

 of a left maxilla with the third premolar (Chinchilla). Anterior 

 portion of a right mandibular ramus (Cat. No. 12,029) with m^ 

 and fangs of the premolars and canine. The length of the 

 premolar series is 57*5 mm., in the type 56*5 mm., in the living 

 species 54*5 mm. ; depth of mandible below the first premolar 

 28 mm. Anterior orifice of dental canal beneath anterior half of 

 p^. Length of symphysis 53 mm. against 57 5 in the type speci- 

 men and 52*5 in T. cynocephalus (Chinchilla). A portion of a 

 left mandibular ramus with p^, p'-^, and part of p'^ (Cat. No. 

 12,030). Length of p^p^ 21*5 mm., as in the recent species, the 

 interspace being less than in the type, in which the two teeth 

 occupy a space of 30*5 mm. Dental orifice beneath the middle of 

 p" (Gowrie Creek). 



