NOTES ON THE CANID® OF THE WHITE RIVER OLIGOCENE. 349 
VI. Tue Hinp Line. 
The pelvis is represented by several specimens belonging to D. vetus, D. hartshornianus 
and D. felinus, all of them incomplete, but so supplementing one another, that the shape 
of the os innominatum may be determined, with the exception of the anterior border of 
the ilium, which is unfortunately missing from all the individuals. 
So far as it is preserved, the pelvis is rather feline than canine in character, both in 
its general outlines and in its details of structure. The neck or peduncle of the ilium is 
wider and shorter than in Canis, narrower than in Fe/is; the anterior plate expands to 
its full width somewhat more abruptly than in the latter, but enough of the broken 
fossils remains to show that the iliac plate has the narrow form which is found in the 
cats and does not expand so much at the free end as in the modern dogs. The gluteal 
surface is not simply concave, as it is in the two recent genera mentioned, but is divided 
into two unequal fossee by a prominent longitudinal ridge, such as occurs, though not so 
prominently developed, in certain viverrines. This feature is repeated in another White 
River dog, Cynodictis, and is almost duplicated in the contemporary sabre-tooth, Dinictis, 
another of the many correspondences between Daphenus and the early Machairodonts. 
The sacral surface is placed much less in advance of the acetabulum than in Canis, and 
oceupies about the same relative position as in the cats. The ischial border of the ilium 
is, for most of its length, nearly straight and parallel to the acetabular border, but 
descends more abruptly than in either the recent dogs or cats, and follows a course more 
like that seen in Viverra. As in Canis, the acetabular border is more distinctly defined 
than in the true felines, and ends near the acetabulum in a long, roughened prominence, 
the anterior inferior spine. The pubic border is very short, and hence the iliac surface 
is not well defined. The acetabulum is of moderate size and has somewhat more elevated 
borders than in the cats. 
The ischium, which in the existing Canide is much shorter than the ilium, is very 
elongate, and is proportionately even longer than in the felines. The anterior portion of 
this element is straight, rather slender, and of obscurely trihedral section; behind the 
acetabulum the dorsal border is arched upward into a convexity, the spine of the ischium, 
terminated abruptly behind by the ischiadic notch, which is as conspicuous as in the cats, 
while in Canis it is very faintly marked. The posterior part of the ischium is expanded 
into a broad and massive plate, which is very rugose upon the external surface. This 
posterior portion is not so strongly everted and depressed as in the modern dogs, and 
there is no such stout and prominent tuberosity, which, again, constitutes a resemblance 
to the cats. 
The pubis is L-shaped and its anterior, descending limb is unusually long, broad 
and thin, much more so than in the felines or modern dogs. The obturator foramen is 
