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Parasaurolophus Walkeri
25
Both feet are preserved intact with the exception of phalanx V4 in both cases. While the bones are to some extent imperfect and deformed, there is, nevertheless, a certain amount of difference between the two feet which is not due to accidents after entombment. The most striking of these differences is the abnormally narrow distal end of metacarpal III in the left foot.
It has been thought better to illustrate the manus fully rather than to give detailed descriptions of the individual bones. The plates and the comparative measurements given below should suffice.
COMPARATIVE MEASUREMENTS OF METACARPALS
| Parasaurolo- phus walkeri |
Saurolophus osborni |
Kritosaurus incurvimanus |
Trachodon mirabilis |
Claosaurus annectens |
Hypacrosaurus altispinus | |
|---|---|---|---|---|---|---|
| mm. | mm. | mm. | mm. | mm. | mm. | |
| Metacarpal II, length | 173 | 250 | 185 | 200 | 245 | 220 |
| Metacarpal II, max. diameter proximal end |
44 | 39 | ||||
| Metacarpal II, max. diameter distal end |
45 | 37 | ||||
| Metacarpal III, length | 208 | 330 | 226 | 220 | 265 | |
| Metacarpal III, max. dia- meter proximal end |
54 | 49 | ||||
| Metacarpal III, max. dia- meter distal end |
60 | 50 | ||||
| Metacarpal IV, length | 195 | 330 | 225 | 215 | 280 | |
| Metacarpal IV, max. dia- meter proximal end |
61 | 68 | ||||
| Metacarpal IV, max. dia- meter distal end |
57 | 51 | ||||
| Metacarpal V, length | 90 | 130 | 94 | 75 | ||
| Metacarpal V, max. diameter proximal end |
48 | 52 | ||||
| Metacarpal V, max. diameter distal end |
32 | 35 |
