138 



J/)'</rns — yjie ^ii/icn'c<i)i J(/(/>n//-s. 



crown of upper t-arnassial measuring 31 by 16; crown of mid- 

 dle upper premolar, 20 by 13; lengtli of u])per canine from 

 gums (tooth worn), 37; length of incisor toothrow, 33.5. The 

 audital bulla^ are greatly flattened, the space between bulla and 

 paroccipital tilled, but that between it and mastoid not com- 

 pletely so. Brazilian skulls are somewhat smaller than those 

 from Parana, Paraguay, and Bolivia, and have smaller teeth, 

 less flattened audital bulla^; and in some there is a sulcus be- 

 tween the bulla and the mastoid process. 



The juguars of South America may be distinguished from 

 those of Central America and Mexico as follows: 



South American Jaguars. 



Mexican and Centrai American Jaguars. 



Postpalatal fossa, in adult male, l\)slpalatal I'ossa less than 23 



more than 23 mm. wide. mm. wide. 



Audital bulla llattened, willi Audital bulla intialed, with deep 



space between it and paroccipital fossje between it and the mastoid 



and mastoid processes filled up. and paroccipital processes. 



Ijength of second and third pre- Length of second and third pre- 

 molars, taken together, more than molars, taken together, less than 

 4.1 mm. 4."> mm. 



Maximum diameters of male Ma.ximum diameters of male 



skull, 300 by 200 mm. skull, 280 by 180 mm. 



The remaining forms, from north of South America, of which 

 I have examined six skins and thirteen skulls, may be identified 

 by means of the i'o I lowing key: 



Skin with a rosette pattern, in black, extending from 

 neck to hips and from vertebral line to belly. Outer 

 surface of ear, all black. Skull of male less tlian 21.) 

 mm. in basal h'ngth. Inhabits Central America, 

 from Honduras to Panama / Fdi.s centrKUfi 



Skin with distinct rosettes only on middle dorsal area; 

 elsewhere they are disorganized into isolated black 

 spots. Outer sva-face of ear witli a tawny central spot. 

 Skull of male more than 215 mm. in basal length. 

 Distributed throughout the lowlands of Mexico and 

 the atljacenl border of the Tnited States, 



