PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 
EXPLANATION OF PLATE V. 
Fig. 
1. 
Protypotherium 
australe : Left pes, dorsum (No. 9149 American 
Museum). . . . . . 
Fig. 
2. 
( i 
“ Third and fourth metatarsals showing 
the peg and socket articulation at 
the proximal end (No. 9149 Ameri- 
can Museum). . . . . 
Fig. 
3 - 
u 
“ Left manus, dorsum (No. 9149 Amer- 
ican Museum). . . . . 
Fig. 
4 - 
u 
attenuatum : Right manus, dorsum (No. 15,341). 
Fig. 
5 - 
( i 
“ Left pes, dorsum (No. 1 5,341). The 
astragalus is turned slightly toward 
the inner side of the foot. . 
Fig. 
6. 
(( 
australe : Right calcaneum, inner side (No. 
15.828) 
Fig. 
7 - 
( ( 
“ Right astragalus, plantar aspect (No. 
15.828) 
Fig. 
8. 
a 
“ Right navicular, distal aspect (No. 
15.828) 
Fig. 
9 - 
u 
“ Proximal articular surfaces of the 
metacarpals of the left manus (No. 
9149 American Museum). 
Fig. 
10. 
( i 
“ Proximal articular surfaces of the 
metatarsals of the left pes (No. 9149 
American Museum). Metatarsal II 
is supplied from another specimen. 
Fig. 
1 1. 
i < 
sp. : Upper deciduous and permanent dentition, 
crown view (No. 9482 American Museum). 
Fig. 
1 1 a. 
u 
“ P x and Dp-, crown view, Xf (No. 9482 
American Museum). . . . . 
Fig. 
1 ib. 
u 
“ M-, crown view, Xf (No. 9482 American 
Museum). ...... 
Fig. 
1 2. 
(( 
“ Upper deciduous and permanent dentition, 
side view (No. 9482 American Museum). 
Fig- i 3 - 
( i 
“ Lower deciduous and permanent dentition, 
side view (No. 9482 American Museum). 
Fig. 
14. 
( ( 
“ Lower deciduous and permanent dentition, 
crown view (No. 9482 American Museum). 
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