OSTEOLOGY OF POLYGLYPHANODON—GILMORE 259 
by the public foramen, which is located near the internal side. Con- 
stricted transversely below the acetabular end, the pubis widens rapidly 
but more especially toward the median line. The outer side is thick- 
ened and rounded along the border. The anterior or ventral border is 
without special thickening and turns inward from the lateral at 
nearly a right angle. 
Measurements of pelvis of U.S.N.M. No. (15477 (in millimeters) 
Greatest length from upper end of ilium to Symphyseal end of pubis_______ 83. 0 
Greatest Teme thatok, Mic tee creak 88 We VA EA CE APE ER RY OE MER) COA ORR 45.7 
Wadib’ of Tpper ence t mitment ea a a 10. 5 
Width of expanded portion of ilium 
SS 
ae 
—— 
—— 
Fg 
eS i} 
= = Sy yy) 
SS= > y 
Y 
——=—= 
—== 
— 
—a 
——_— 
eae 
a 
= 
—— 
——= 
<— 
SE 
— 
Figure 34.—Left femur of Polyglyphanodon sternbergt Gilmore, U.S.N.M. No. 15477, type, 
natural size: A, Inner view; B, posterior view; C, anterior view. h, Head; ir, trochanter. 
HIND LIMB 
Femur.—In the several specimens of Polyglyphanodon available at 
this time 12 femora are preserved, as follows: two U.S.N.M. No. 15477, 
the type; two of No. 15816; two of No. 15566; two of No. 15568; one, 
lacking the proximal end, of No. 15559; two of No. 15817; and one of 
No. 15819. ‘The description is principally based on the femora of the 
type specimen, shown in figure 34. 
The femur when compared with an /gwana of corresponding size is 
stouter and has heavier articular ends. The great trochanter is 
robustly developed. It has at its extremity a small ovate facet directed 
proximally. 
Between the trochanter and the head there is a broad shallow fossa 
that on the inner side extends downward for a distance of about one- 
