424 PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 



GARZONIA PATAGONICA (Ameghino). 



(Plate LXIII, Figs. 8, 8a, 10-13.) 



Phonocdromus patagonicus Amegh. ; fenum. Syn., etc., p. 100, 1894; Bol. 

 Ac. Cordoba, pp. 355-356, 1894; Segundo Censo, etc., p. 186, 1898. 

 The left half of a lower jaw (No. 15,238) associated with the glenoid 

 portion of the right scapula, the greater part of both humeri and the left 

 radius and ulna, collected by Mr. Peterson from the Lower Santa Cruz 

 beds, five miles south of Coy Inlet, is referred provisionally to this species. 

 The correctness of the identification depends principally on the measure- 

 ments, which agree fairly well with those given by Ameghino (1894, p. 

 i oo) for Garzonia patagonica. This species differs from G. typica and G. 

 minuta in the less elevated condition of the posterior inferior premolar, 

 and from G. captiva in size. 



MEASUREMENTS. 



Length of mandible from posterior border of median incisor alveolus to condyle 0195 

 " " lower dentition exclusive of median incisor. .... .0105 



" " space occupied by antemolars exclusive of median incisor . . .0055 



" " " " " molars 005 



Median incisor, transverse diameter at base ...... .0008 



" " depth at base 0012 



Posterior premolar, antero-posterior diameter at alveolar border . . . .0014 



" " transverse " 000$ 



M T , antero-posterior diameter ......... .002 



" transverse "......... .001 1 



Mj, antero-posterior "......... .0018 



" transverse " oon 



My, antero-posterior "......... .0013 



" transverse "......... .001 



Depth of mandible below M T . . . . . . . . . .0028 



" " " at constriction posterior to M 7 ..... .0023 



Humerus, length (approximate) . . . . . . . . .014 



Radius, length, exclusive of distal epiphysis . . . . .014 



" width of head ooi 5 



" " " distal end 002 



Ulna, length, exclusive of distal epiphysis . ...... -0175 



" greatest width above sigmoid cavity ....... .0028 



