. The Deseado formation of Patagonia . the side, it loolcs most slender;while in reality it is a very broad bone, nearly straight,and with marked rugosities for the attachment of themuscles. We found but one specimen of the humerus, anisolated bone a little smaller than that described by C/audry. Specimen GaudrysNo. 3218 Specimen470 mm. 500 mm. 232 mm. 170 mm. 240 mm. Specimen Gaudrys 3344 Specimens 120 mm. 140 mm. 304 mm. 365 mm. 129 mm. 140 mm. Specimen 3207 116 mm. 124 mm. 223 mm. 248 mm. 96 mm. 88 mm. 48 mm. 44 mm. 47 mm. 45 mm. 125 mm. 145 mm. 105 mm. 100 mm. 75


. The Deseado formation of Patagonia . the side, it loolcs most slender;while in reality it is a very broad bone, nearly straight,and with marked rugosities for the attachment of themuscles. We found but one specimen of the humerus, anisolated bone a little smaller than that described by C/audry. Specimen GaudrysNo. 3218 Specimen470 mm. 500 mm. 232 mm. 170 mm. 240 mm. Specimen Gaudrys 3344 Specimens 120 mm. 140 mm. 304 mm. 365 mm. 129 mm. 140 mm. Specimen 3207 116 mm. 124 mm. 223 mm. 248 mm. 96 mm. 88 mm. 48 mm. 44 mm. 47 mm. 45 mm. 125 mm. 145 mm. 105 mm. 100 mm. 75 mm. 22 mm. 45 mm. 132 mm. 105 mm. Humerus, total lengthHumerus, width at jiroximal endHumerus, width at middle of shaftHumerus, antero-posterior diam. of shaftHumerus, width across epicondyles We found neither the radius nor the ulna, but Gaudryfigures both, giving the following measurements. Radius, lengthRadius, proximal , length (calculated)Ulna, width of olecranon 245 mm. 127 mm. 280 mm. 140 mm. PYROTHERIUM SORONDOI 183. c 3 Fig. IIS. .1/., atlas; AA:.,a.\is; , third cervical; ,fourth cervical—i/s natural size; apophysis of atlas isrestored after Gaudry and the neural arch of cervical 4is restored from the opposite side.


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