Page:Parasaurolophus walkeri, a new genus and species of trachodont dinosaur.pdf/27

other trachodonts. The proximal parts of both bones are rather badly crushed, rendering exact measurements difficult. The only significant features are indicated in the comparative measurements given below.

COMPARATIVE MEASUREMENTS OF ULNA

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	Parasaurolophus walkeri	Kritosaurus incurvimanus	Saurolophus osborni
Length over olecranon	560	610	680
Minimum girth of shaft	180	158

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Radius (Plate VIII, Figs. 1 and 2)-This bone has the usual form of a long thin shaft expanded at both ends.

FIG. 6.	FIG. 7.

Figure 6. Left ulna, intero-anterior view. One-sixth natural size.
Figure 7. Left ulna, externo-posterior view. One-sixth natural size.