582 
PROFESSOR OWEN ON THE AFFINITIES OF THYLACOLEO. 
Description of the Plates. 
PLATE 39. 
Fig. 1. Palatal or working surface of the teeth of the upper jaw, Thylacoleo 
carnifex. 
Fig. 2. Corresponding surface of the teeth of the lower jaw, ibid. 
Both figures are of the natural size. 
PLATE 40. 
Fig. 1. Radius, Thylacoleo carnifex. 
Fig. 2. Proximal articular surface of the same bone. 
Fig. 3. Proximal end of ditto. 
Fig. 4. Ulna, Thylacoleo carnifex. 
Fig. 5. Front view of proximal articular surface. 
Fig. G. Ungual phalanx, Thylacoleo carnifex. 
Fig. 7. Under view of ditto. 
Fig. 8. Claw-bearing portion, with one-half of the sheath removed. 
(In ungual phalanges, probably of the hind jaw, the sheath is little, if 
at all, developed.) 
PLATE 41. 
Fig. 1. Outside view of mandible and teeth, Thylacoleo carnifex. 
Fig. 2. Inside view of mandible and teeth, Thylacoleo carnifex. 
Fig. 3. Outside view of mandible and teeth, with grinding surface of the molars, 
Pliascolarctos fuscus. 
Fig. 4. Inside view of mandibular ramus and teeth, Phylangista Cookii. 
Fig. 5. Outside view of mandible and teeth, Plcigiaulax Becclesii. 
All the figures are of the natural size. 
