PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA 243 
Fia. 41. Internal View of Right Half of Pelvis of D. superbus. 4 nat. size. 
Tae Hinp Lins. 
(Plate LX XVIII and Plates LX XXI-II.) 
The pelvis of the type is represented by the greater part of the ilium, while the 
ischium and pubes are represented only by the portions surrounding the acetabu- 
lum. In a larger specimen of Daphwnodon which belongs to the Amherst College 
the innominate bone is more nearly complete (see Pl. LXXVIIJ), but the posterior 
portion of the ischium is also lacking in this specimen. 
In comparing the pelvis with Professor Scott’s description of that in Da uphanus 
(J. c., pp. 349-350) it is evident that the similarity in the two genera is quite close. 
As in the Oligocene genus the gluteal surface of the ilium is divided by a prominent 
longitudinal ridge, unlike that in recent dogs, or cats where the surface is more 
evenly concave. The ilium is less expanded at the supra-iliac border than in 
Canis, but probably somewhat more so in comparison with that in J Japhanus. The 
ilium, as a whole, is relatively broader than in the tiger or lion, and is not unlike 
that in Viverra zivetta, as was also observed by Professor Seott in his study: of 
Daphenus. ‘The attachment for the sacrum is quite heavy and is situated well 
back. ‘The ischial border and the great sacro-sciatic notch is short. The iliac sur- 
face is not well defined on account of the short pubic border; the ilio-pectineal 
eminence however, is, well developed. The acetabular border is very prominent 
and terminates in a large tubercle at the anterior border of the acetabulum. ‘The 
latter is of moderate size and depth, the center of the floor being occupied by a 
large depressed and roughened area, which indicates the attachments of a large 
cushion of fat as well as the ligamentum teres of the femur. The cotyloid notch is 
quite broad and excavates the ischium deeply. 
As in Daphenus the ischium is long in proportion to that in the recent dogs 
and even longer proportionally than in the tiger or lion; the obturator foramen 
consequently has a more oblong outline than in the above mentioned genera and 
the pelvis as a whole has a greater length. 
