Vol. 5] 



Merriam 



. — John Day Camivora. 



27 



On the femur, the gluteal ridge and spiral line are very strongly 

 marked. The space between them is set off as a perfectly flat, 

 triangular area very distinctly marked off. The extension of the 

 linea aspera below is a long, sharp ridge. The upper portion of 

 the gluteal ridge is considerably enlarged, and is quite distinctly 

 separated from the great trochanter. This tubercular enlarge- 

 ment is really comparable to a reduced third trochanter. As 

 nearly as can be judged from comparison with the figures pub- 

 lished by Hatcher, 10 it is similar to the development of the gluteal 

 ridge in Daphaenus felinus, though Hatcher stated that a third 

 trochanter was wanting in that form. Eyerman 20 mentions a 

 third trochanter in Daphaenus, but I find no reference in his 

 paper to the character of the femur of Temnocyon in this region. 



The elements of the epipodial region in both anterior and 

 posterior limbs are stated by Eyerman to be relatively short com- 

 pared with the propodial segments. Unfortunately no one of 

 these elements is perfectly preserved in specimen 9999, so that 

 the exact measurements of length cannot be obtained. The manus 

 is not preserved. In the pes the principal elements are present 

 excepting the phalanges, and the structure of the foot in the main 

 features resembles that of ferox. 



Affinities. — In some characters this species seems to be less 

 specialized than T. ferox, but in general the stage of evolution is 

 nearly as far advanced. T. ferox occurs in the Upper John Day. 

 The best known occurrence of T. altigenis is near the boundary 

 between the middle and upper divisions. The relationship of aUi- 

 genis to wallovianus is doubtful, though the greater reduction of 

 M 2 in wallovianus may indicate that it is a more advanced form. 

 The occurrence of wallovianus is unknown. 



The relation of the genus Temnocyon to the White River 

 Daphaenus has been ably discussed by Scott, 21 Eyerman, 22 Wort- 

 man and Matthew, 23 Wortman, 24 and more recently by Hatcher. 25 



19 J. B. Hatcher. Op. tit., PI. 19, Fig. 1. 



"J. Eyerman. Temnocyon and Mypotemnodon. Amer. Geol., Vol. 17, 

 p. '279, 1896. 



21 W. B. Scott. Trans. Am. Phil. Soc, Vol. 17, p. 73, and Vol. 19, p. 406. 



J. Eyerman. Op. tit., p. 283. 

 23 Wortman and Matthew. Op. ext., p. 118. 



- 4 J. L. Wortman: Am. Jour. Soc, June, 1901, Vol. 11, p. 449. 

 * J. B. Hatcher. Op. tit., p. 105. 



