76 



PATAGONIAN EXPEDITIONS: PALEONTOLOGY. 



.168 



Occiput, width at top . 



.029 





Cranium, width at constriction 



.032 



.180 



" greatest width 



.041 





Zygomatic arch, length 



.094 



.110 



Palate, length in median line . 



.092 



.070 



" width at pi 



.020 



•OS7S 



Face, width over lachrymals . 



•04s 



.047 



Rostrum, width . 



.022 



Skull, length in median basal line . 



" " condyle to premax- 



illary ..... 

 Cranium, length condyle to anterior 



rim of orbit .... 

 Face, length orbit to premaxillary . 

 Occiput, height .... 

 " width at base . 



A fragmentary fore-limb, No. 15,728, not associated with skull or teeth, 

 may be provisionally referred to this species. From this the following 

 measurements were taken. 



Measurements. 



?.oi6 

 .013 



•037 



.020 



.012 



.0185 



.018 



.017 



.028 



.025 



.018 



A fore-foot, lacking the phalanges, is associated with the mandible, No. 

 15,722, and, as the measurements of the teeth indicate, this was an animal 

 of advanced age with unusually heavy grinding teeth. In the absence of 

 the upper premolars, the reference is provisional only. This specimen is 

 shown in Plate XI, fig. 9. 



Measurements. 



Radius, distal width 



.023 



Metacarpal III, proximal width 



" thickness 



•017s 



<f 



" " thickness 



" " width over articular 





Phalanx i, digit III, length . 



surface 



.019 



li 



I, " " prox. width . 



Radius, distal thickness over articu- 





ti 



I, " " " thickness 



lar surface .... 



.012 



tt 



2, " " length . 



Ulna, distal width 



.007 



ft 



2, " " prox. width . 



" thickness . 



.0105 



it 



2, " " dist. width . 



Carpus, length in median hne 



.020 



Ungual, digit III, length 



width .... 



.025 



It 



" " greatest width . 



Metacarpal II, proximal width 



.008 



11 



" " prox. width 



Metacarpal II, proximal width . .008 



" " " thickness . .012 



Metacarpal III, length . . . .069 



" " proximal width . .016 



Metacarpal III, proximal thickness .012 



" distal width . . .018 



Metacarpal IV, proximal width . .007 



" " " thickness .0085 



Localities. — The type-specimen was found in the cliffs of the Rio Santa 

 Cruz; Nos. 15,722 and 15,728 were collected by Messrs. Hatcher and 

 Peterson at Killik Aike, and No. 15,712 five miles south of Coy Inlet. 

 In the collection of the American Museum, No. 9245 was obtained by Mr. 

 Brown at Felton's Estancia, Rio Gallegos. 



