128 MEMOIRS OF THE CARNEGIE MUSEUM 
of the Hntelodontidx, the peduncle being shorter and much heavier, the ilio-pectineal 
eminence wanting (except a slight enlargement at the extreme anterior border of 
the acetabulum), and the anterior portion flares out into a heavy fan-shaped plate 
with little or no eversion such as is found in Archeotherium and Dinohyus. 
The ischium, as has already been said, is much shorter in Dinohyus, and its 
vertical diameter posteriorly is somewhat greater than in the Princeton specimen. 
The depressed area for ligamentary attachments takes up a considerable space 
of the acetabulum and the cotyloid notch is wide, though quite shallow. The 
dorsal border, or spine, of the ischium is not nearly so prominent as in Archothe- 
rium, and the lesser sacro-sciatic notch is quite short, with a heavy rounded border, 
which gradually decreases in its backward trend. Posteriorly this notch is suddenly 
recurved, due to the anterior extension of the prominent tuberosity of the ischium. 
The vertical diameter of the ischium from the point of the tuberosity to the 
symphysial border, is relatively somewhat greater in Dinohyus than in Archexothe- 
rium, and this results in giving the former genus a slightly deeper pelvic cavity. 
In Hippopotamus the body of the ischium back of the acetabulum is longer and more 
nearly circular in outline than is known in the Entelodonts, and posteriorly it flares 
out to form a heavy tuberosity as in the latter family, but the symphysis of the 
ischium is rather delicately developed. Another important difference is seen in the 
small area of the acetabulum taken up by the ligamentary attachments and the 
small deep cotyloid notch in Hippopotamus. 
The pubis, though short, is relatively slightly longer than in Archexotherium. In 
the region of the spine the pubis is very heavy and there is a large symphysial sur- 
face which meets that of its fellow, making the symphysis unusually heavy. Further 
back the ramus of the pubis is thinner and unites with the ischium to form the 
lower border of the obturator foramen. The latter is of large size, but is, as might 
be expected, less elongated in the antero-posterior direction than in Archxotheriwm. 
In neither Sus nor Hippopotamus is there any marked similarity to the Entelodonts 
in the region of the pelvis, though there is more general resemblance, as Professor 
Scott has stated (87, p. 310), between the latter genus and the Entelodonts than 
there is in the former. 
MEASUREMENTS OF PELVIS. 
Greatest lengpl, vp proximately: eter, ee asviresiinet, ates. cechone lett es aeons 
Length from middle of acetabulum to end of ischium. 
oe ae (sl Ch “ crest of ilium, approximately........... 800 
Greatest vertical diameter of ischiuma..:.2:.5.10s10v.s.ctccerccocsscecccocsoccecececoosese 192 
Femur. — The femur is complete, except the great trochanter which was lost in 
the process of collecting. The femur is long and slender, but proportionately 
