6 4 



PATAGONIAN EXPEDITIONS I PAL/EONTOLOGY. 



flattened, of a peculiar trowel-like shape, and very bluntly pointed. No 

 other known genus of Santa Cruz armadillos has similar claws. In the 

 various digits the unguals differ little save in size. 



The following measurements are taken from No. 15,491, except those 

 of the astragalus, which have been supplied from another specimen (No. 

 15,553) which agrees with the first almost exactly in size. 



MEASUREMENTS."! 



Astragalus, length 018 



" width of trochlea 015 



" " " head 009 



Calcaneum, length 030 



" width of proximal end 015 



" " " distal end 013 



Metatarsal I, length 012 



" " width of proximal end 008 



" " " distal end 006 



Metatarsal II, length 02 1 



" " width of proximal end . . . .007 



" " " " distal end 007 



Metatarsal III, length 026 



" " width of proximal end .: .009 



" " distal end 0085 



Metatarsal IV, length 0215 



" - " width of proximal end. . .007 



" " distal end 008 



First phalanx, digit I, length 013 



First phalanx, digit I, width of proximal 



end 006 



First phalanx, digit II, length 012 



First phalanx, digit II, width of proximal 



end 008 



First phalanx, digit III, length .009 



First phalanx, digit III, width of proximal 

 end .010 



First phalanx, digit IV, length 008 



First phalanx, digit IV, width of prox- 

 imal end 009 



Second phalanx, digit II, length oio 



Second phalanx, digit II, width of prox- 

 imal end 007 



Second phalanx, digit III, length 0085 



Second phalanx, digit III, width of 



proximal end 009 



Second phalanx, digit IV, length 0075 



Second phalanx, digit IV, width of 



proximal end 0085 



Ungual, digit I, length oil 



" " " width of proximal end .007 



" II, length 014 



" " " width of proximal end .0085 



" III, length 018 



Ungual, digit III, width of proximal 



end oio 



Ungual, digit IV, length 016 



" " width of proximal end .009 



Digit I, length 036 



"II, " 057 



" III, " 061 



" IV, " 054 



PROEUTATUS LAGENA Ameghino. 



(Plates XIII, Figs. 1-3, 7 ; XIV, Fig. 7 ; XV, Fig. 7, 8.) 



Eutatus lagena Amegh. ; Enumeracion sistematica, etc., 1887, p. 26. 

 Proeutatus lagena Amegh. ; Revista Argent. Hist. Nat., T. I, p. 327. 

 Thoracotheriitm vetttm Mercerat; Revista del Museo de La Plata, T. II, 

 1891, p. 44. 



