NO. 6 



PALEOCENE FAUNAS OF BISON BASIN — GAZIN 



33 



3 



I 



C. oerogenius n.sp. 



C.cf. 

 procyonoides 



C. cf montanensis C. cf. ferox 



7.5 8.0 8.5 9.0 9.5 10.0 105 1 1.0 115 12.0 12.5 13.0 135 14.0 14.5 15.0 



C. ferox 



Cproeyonofdss 



73 7.8 8.3 8.8 9.3 9.8 10.3 108 11.3 11.8 12.3 12.8 13.3 13.8 143 i4B 15.3 



Fig. 2. — Histogram of length of M^ of Claenodon from Bison basin Paleocene, 

 above, and Torrejon (modified from Simpson, 1937) of New Mexico, below. 



reason a histogram using a linearly arranged grouping of sizes is 

 misleading unless this characteristic is understood. 



MEASUREMENTS IN MILLIMETERS OF TEETH IN SPECIMENS OF 



Claenodon, cf. jerox (cope) 



U.S.N. M. 

 No. 20797 



M*, anteroposterior diameter : transverse diameter* 10.7 : 15.9 



M', anteroposterior diameter : transverse diameter 8.2 : ii.i 



U.S.N.M. 

 No. 20633 



Ma, anteroposterior diameter : transverse diameter 11.4: io-4 



Ms, anteroposterior diameter : transvcr.se diameter 12.7 : 9.1 



• Transverse diameter taken lingually to base of enamel. 



