PATAGONIAN EXPEDITIONS : PALEONTOLOGY. 
EXPLANATION OF PLATE III. 
PAGE 
Fig. i. Protypotherium australe: Skull and mandible, left side (No. 9565 
American Museum). . . . 19 
Fig. 2. “ “ Skull from above (No. 9565 American 
Museum). ..... 20 
Fig. 3. “ “ Skull from below (No. 15,598). . . 21 
Fig. 4. . “ “ “ “ behind (No. 9565 American 
Museum). . . . . . 21 
Fig. 5. “ attenuatum : Skull, leftside (No. 15,665). . . 44 
Fig. 6. “ “• “ and mandible, left side (No. 
9187 American Museum). The 
lachrymal is broken off in this 
specimen. ..... 44 
Fig. 7. “ “ Internal structure of the right mas- 
toid, showing cancellae (No. 
15.665) 20 
All the figures are natural size. 
(vol. VI.) 
