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Parasaurolophus Walkeri
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from the prepubis of Kritosaurus, in which the upper and lower margins of the blade-like part are approximately parallel. The peculiar union with the ilium has been referred to above.
The postpubis is rather short and flattened towards the extremity. It seems to lie farther from the ischium than usual. The pubic notch is open. The acetabulum is elongated longitudinally.
COMPARATIVE MEASUREMENTS OF PELVIC GIRDLE
| Parasaurolo- phus walkeri |
Saurolophus osborni |
Kritosaurus incurvimanus |
Trachodon mirabilis |
Claosaurus annectene | |
|---|---|---|---|---|---|
| Ilium, length in straight line | 1015 | 1160 | 1013 | 1030+ | 1150 |
| Ilium,“ length along superior margin |
1120 | ||||
| Ilium,“ length of anterior pro- cess |
445 | 480 | |||
| Ischium, length | – | 1200 | 1026 | 1090 | |
| Ischium,“ width 300 mm. from proximal end |
110 | ||||
| Ischium,“ girth at this point | 280 | ||||
| Pubis, total length | 894 (?) | 1150 | 1038 | 630 | |
| Pubis,“ width of blade at pre- pubis |
260 | 310 | 163 | 200 | 220 |
| Pubis,“ preacetabular border to anterior end |
516 | 590 | 519 | 360 | 450 |
| Pubis,“ iliac union to anterior end of prepubis |
636 |
HIND LIMB
The only part of either hind limb preserved is the left femur.
Femur (Fig. 9, Plate VI)—This bone is of the ordinary type, and is sufficiently defined by the figures and the com-
