NOTOGALE 217 
that we have to do with an animal not only smaller than 
the preceding, but on much slenderer lines. The following 
are the measurements of the two specimens. 
SPECIMEN 3117 
Upper dentition, molar 2, length 8 mm., width 6 mm. 
Upper dentition, molar 3, length 2 mm., width 6 mm. 
SPECIMEN 3060 
Lower dentition, premolar 3, length 6 mm., width 2.5 mm. 
Lower dentition, molar 2, length 7 mm., width 4 mm. 
mz 
pm2 3 wy 
Lis aa 
Fig. 143. Left mandible—natural size. 
Notogale tenuis Ameghino 
? Pharsophorus tenuis Amegh., 1897, Bol. Inst. Geog., Argen., t. 18, p. 504. 
This species was founded by Ameghino on a single lower 
premolar 3 which is 3 mm. in length. No further descrip- 
tion is given and no figure. 
Proborhyaena Ameghino 
Proborhyaena Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 501. 
The genus is founded on a large lower jaw carrying the 
canine and premolars 3 and 4 and roots or alveoli for the 
other teeth. It is the largest carnivor recorded from 
Patagonia, and as large as a small bear. It is not possible 
