247 



PLATE XXVI. 



Fig. 1. Outside view of anterior part of mandible and teeth (il, d 4, m 1) of an immature 

 Liprotodon : the first molar (d 3) is given in outline. 1 a, section of incisor, i. 



Fig. 2. Inside view of anterior part of the same mandible and teeth (i 1, d 3 restored in 

 outline, d 4, m 1). 



PLATE XXVII. 



Fig. 1. Section of upper molars (m 1, m 2, m 3) of a mature, not old, Liprotodon ; 

 nat. size. 



Fig. 2. Inside view of mandible and teeth of ditto: reduced to one-sixth. 

 Fig. 3. Back view of mandibular condyle: reduced to one-sixth. 

 Fig. 4. Front view of ditto : reduced to one-sixth. 



Fig. 5. Section of anterior part of mandible and incisor tusk of an immature Dipro- 

 todon; nat. size. 



PLATE XXVIII. 



Fig. 1. Axis, or vertebra dentata: — nat. size. 

 Fig. 2. Portion of atlas vertebra: — nat size. 



PLATE XXIX. 



Fig. 1. Front view of axis. 



Fig. 2. Under view of axis. 



Fig. 3. Back view of axis. 



Fig. 4. Back view of third cervical vertebra. 



Fig. 5. Back view of an anterior dorsal vertebra. 



Fig. 6. Side view of the same dorsal vertebra. 



Fig. 7. Side view of a succeeding dorsal vertebra. 



Fig. 8. Back view of the same vertebra. 



Fig. 9. Side view of the body of a lumbar vertebra. 



Fig. 10. Back view of ditto. 



Fig. 11. Under view of ditto. 



Fig. 12. Epiphyses of the body of a cervical vertebra: a, edge- or side-view. 

 Fig. 13. Epiphyses of the body of a lumbar vertebra: «, edge-view. 

 All the figures are one-third the natural size. 



PLATE XXX. 



Fig. 1. Inner or subscapular surface of the left scapula. 



Fig. 2. Outer surface or "dorsum" of the left scapula. 



Fig. 3. Articular end, with glenoid cavity of the left scapula. 



One-third the nat size. 



