EXTINCT TYPE OF DOG. 



I\Ieasurements of the Pelvis. 



Extreme length 



Greatest breiulth (;it ischyiiic tuberosities) 



Breadth at acetabuUi 



Distance between Innominate bones at posterior upper border 

 of sacral surface 



Distance between the most diverging points of the suprailiac 

 borders (below) 



Distance between the most convergent points of the supra- 

 iliac border (above) 



Greatest breadth of innominate bone 



Height at anterior end of pubic symphysis 



Femur (pi. I, figs. 5 — 10). — The great trochanter rises slightly above 

 the head of the femur, instead of being on a level with or slightly below 

 it, as is usually the case in the Canidce, and the lesser trochanter forms a 

 very prominent conical point fully 2""" in length. The well-marked ridge 

 bounding the outer border of the head is situated on the median line of the 

 shaft, and in line with the inner crest of the greater tuberosity. The 

 cavity at the top of the shaft is thus nearly concealed when viewed from 

 behind, while the head occupies one-half of the diameter of the shaft 

 instead of one-fourth to one-third as in the dog, wolf, and fox (pi. I, fig. 5). 

 The posterior surface of the proximal end of the shaft thus j)resents an 

 appearance widely different from what ordinarily obtains in the Canidce. 

 The distal extremity descends obliquely, the trochlear portion having an 

 extension posteriorly beyond the line of the posterior border of the shaft 

 equal to nearly twice the antero-posterior diameter of the shaft, instead 

 of merely equaling it as in the other forms with which the present sj)ecies 

 is here compared. The condyles are narrower and less widely separated 

 by the intercondylar notch; the trochlear articular surface is also narrow, 

 prolonged, and looks more directly forward. The shaft immediately above 

 the condyles has its posterior face greatly expanded and deeply hollowed. 

 In other respects the femur is noteworthy only for its shortness and con- 

 sequent stoutness of form. This feature becomes a striking one when the 

 femur is considered in relation to the pelvis, which it only barely equals in 

 length instead of gi-eatly exceeding. In the fox the ratio of the length of 

 the pelvis to that of the femur is as 71 to 100; in the coyote, the bull terrier, 



