b EXTINCT TYPE vF DOG. 



thickness and other dimensions, except length, it will be noticed that there 

 is a close agreement between the cave specimen and that of the bull 

 terrier. In length, however, the latter exceeds the former in the ratio of 

 100 to 70, which, taken with the other dimensions, throws into strong light 

 the exceeding shortness and stoutness of the humerus in the cave example: 



Measurements of the Humerus. 



Pelvis (pi. III). — The pelvis in the present species differs from that of 

 ordinary Canidce in only one important feature, namely, the high angle 

 formed by the pre- and post-acetabular portions. In respect to the relative 

 size of its different parts, and their individual contours, including even the 

 ridges and tuberosities for muscular attachment, the differences are nut 

 greater, with possibly one exception, than obtains between different races 

 of the domestic dog, or between different species of the genus Cards. The 

 posterior portion of the ilium is narrower antero-posteriorly in relation to 

 its more expanded anterior part than is the case with any of the other 

 types with which it is here compared. Its truly remarkable feature is the 

 high angle formed by the pre- and post-acetabular portions (pi. III. fig. I ). 

 which gives to the pelvis as a whole a most peculiar and striking aspect. 

 Placing the pelvis with the ventral surface upward, it is found that the 

 ischiac axis, or ,-i line passing through the tuberosity of the ischium and 

 the center of the acetabulum, forms in the fox an angle with the plane 

 of rest of 29°; in the coyote the same angle is 31°; in the wolf, 32°; in 

 the bull terrier. 31°; in the Newfoundland dog 32°, from which it rises 

 in the present species to 4o°, or is nearly fifty per cent, greater than in 

 the others. In respect to size, the pelvis is aboul one fifth shorter than 

 that of the coyote, and about one tenth less in other dimensions. 



