632 Troxell— Vertebrate Fossils of Rock Creek, Texas. 





Group 



III 









Description 







Fossil 

 No. 10080 



Eatio 



Recent 

 No. 1077 



M 1 (small) 













Greatest trans, diam. 







1-7 



94 



1-8 



Across metacone trans 



5. diam. 





1-5 



88 



1-7 



Ant.-post. diam. parametacone 





1-2 



80 



1-5 



Ant. -post. diam. over 



middle 





0-8 



82 



1-1 



Group IV. 

 Description ^«g„ Eatio »»$,, 



Phalanx. No. 12 Small toe 



Length i 2*0 77 2*6 



Prox. diam. trans. 0*7 70 1*0 



Prox. diam. ant. -post. 0*6 66 0*9 



, Dist. diam. trans. 0*5 63 0*8 



Dist. diam. ant.-post. 0*4 66 0*6 



Shaft, diam. trans. 0*4 66 0-6 



Shaft, diam. ant.-post. 0-3 60 0*5 



r 67 



Speed index — 5-00 4-33 



Small tibia No. 244 



Thickness, dist. ant.-post. 1-2 57 2-1 



Shaft, diam. trans. 1-0 63 1-6 



Shaft, diam. ant.-post. 1*0 67 1*5 



Width, dist. trans. 1*7 61 2*8 



9 62 



The foregoing tables furnish the basis for classifying the 

 bones into groups representing the separate individuals, and 

 further serve, as already suggested, to point out specific char- 

 acters. A still further use of ratios in an attempt to identify 

 the different animals with known types results in the following 

 tables. The dimensions of the different specimens were taken 

 from the descriptions in the literature, and the ratios to the 

 recent C. familiaris No. 1077 were computed. From the 

 ratios of all the available dimensions of each type, only the 

 average ratio is given in the table below. 



Ratios of Specimens in the Literature. 



Per cent 



Cards haydeni Leidy (9.21) _ 159 



Canis dims Leidy (8.167) 152 



Group J. Peabody specimens 151 



Canis indianensis (dirus) (3.458). Cope's Texas specimen, 



about _ _ . - 150 



