PLEISTOCENE JAGUARS McCRADY ET AL. 



505 



therefore, justified in putting these three fossils into any of the con- 

 temporary subspecies of jaguar. 



The chances of their belonging to PcmtJiera atrox^ while not quite 

 so improbable, are also remote. The crown length of P* in P. atrox 

 averages 39.4 mm. with a minimum of 35.0 mm., a maximum of 45.0 

 mm., and a standard deviation of ±2.43 mm. The deviation of our 

 fossils is 3.37cr, which means that there is about one chance in 1,400 



-,04 



.04 



.08 



.12 



.16 .20 



Craighead cat 



■A-- 

 \ 



•t- P atrox 

 a P. augusfa 

 A P concolor 

 X P. onca , 



I I I I I I 



Greatest lengtti 



Dorsovenfrat diameter 

 of proximal end 



Transverse diameter 

 of proximal end 



Least diameter of stiaff 



Transverse diameter 

 of distal end 



Figure 98. — Ratio graph for the second metatarsal, based upon Simpson's (1941b) figure 

 3, to which has been added the line for Panthera augusta. 



.04 



+ P. atrox 

 a P augusta 

 X P onca 



Lengtti of Fourfti 



Upper Premolar 



Shall width 



. Length of Tibia 



Lengtti of 



Humerus 



Lengft) of Third 



Metatarsal 



_ Length of Third 



Metacarpal 



-L ength of Femur 



Skull length 

 ■ Length of Ulna 



Figure 99. — Ratio graph based upon the same data as figure 97, but with the order of 

 structures changed to make comparison of Panthera atrox and P. augusta clearer, with P. 

 atrox still used as standard. 



that they could be P. atrox. The other two {P. augusta and P. 

 veronis) might occur as normal variations of atrox in about 1.23 

 percent of all cases, or against odds of 80 to 1. That three premolars 

 of these dimensions would be found if P. atrox were the only form 

 involved has an improbability of 10 million to 1. 



