PATAGONIAN EXPEDITIONS : PALEONTOLOGY. 
EXPLANATION OF PLATE LXV. 
PAGE. 
Fig-, i. Thylacynus cynocephalus : Skull and mandible from the right 
side, about two thirds the natural 
size (z. e., .68). Specimen in the 
collection of the British Museum 
(Nat. Hist.) ..... 342 
Fig. 1 a. “ “ Skull, palatal view. British Museum 
(Nat. Hist.). About two thirds the 
natural size (z. e., .68). 
Fig. ib. “ “ Skull, posterior view. British Mu- 
seum (Nat. Hist.). About three 
fourths the natural size (z. e., .74). 
Fig. 2. “ “ Mandible, crown view, about three- 
fourths the natural size (z. e ., .74). 
Osteological collection, Princeton 
University. 
Fig. 3. Trichosurus vulpecula : Skull of a young individual, palatal view, 
Xy. No. 413, osteological collection, 
Princeton University. Young indi- 
vidual lacking M- .... 443 
Fig. jti, “ “ Mandible of the same individual, crown 
view, X y. 
Fig. 4. Petaurus australis (?) : Skull, palatal view, X y. No. 510, osteo- 
logical collection, Princeton University. 
This individual is anomalous in lacking 
the last upper molar . . . . 426 
Fig. 4 a. “ “ Mandible of the same individual, crown 
view, X y. 
(VOL. IV.) 
