36 



PATAGONIAN EXPEDITIONS: PALEONTOLOGY. 



Tarsus, length from external astragalar condyle 



" greatest width 

 Astragalus, length . 



" width of trochlea . 



" length of neck on fibular side 



Calcaneum, length . 



" " of tuber 



" width of free end . 



" distal end 

 Ectocuneiform, length in median line 



width 

 Metatarsal II, length 



" " proximal width. 



" " " thickness 



" distal width 

 Metatarsal III, length 



" " proximal width 



" " distal width 



Metatarsal IV, length 



" distal width 

 Pes, digit III, phalanx I, length 

 " " " " i^ proximal width 



" " " I, distal width 



" " " 2, length 



" " " " 2, proximal width 



" " " 2, distal width 



" " " " 3, proximal width 



" " " 3, " thickne 



Pes, digit IV, phalanx i, length 

 " " " " I, proximal width 



" " " " 2, length 



" " " " 2, proximal width 



No. 



No. 



No. 



pip6. 



15,799- 



0,270. 



.060 



.068 





.031 



.036 





•039 



.044 



.044 



.022 



.026 



.024 



.011 



•013 



.013 





.088 



.086 





.044 



•043 





.021 



.018 





.011 



.012 



.0115 



.011 



.011 



.0205 



.022 



.023 



.072 



.078 

 .0055 





.013 



.015 





.G07 



.008 





.092 



.092 



.094 



.024 



.026 



.024 





.027 



.0255 



.071 







•007 s 







.049 







.024 







.0205 







.0195 







.022 







.020 







.028 







.011 







.020 







.008 







.009 







.0063 







The proportions of these two specimens (Nos. 9196 and 9270) differ so 

 much as to suggest that they belong to different species, possibly even to 

 different genera : No. 15,799, on the other hand, agrees well with Ame- 

 ghino's figures. 



Localities. — No. 15,799 was collected by Mr. Peterson on the Pata- 

 gonian coast, ten miles south of Coy Inlet: No. 9196 (A. M. N. H.) was 

 obtained by Mr. Brown, thirty miles south of Santa Cruz. 



