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138
THE OSTEOLOGY OF THE REPTILES
the whole under side of the pectoral region, meeting in a firm median symphysis; in most plesiosaurs throughout their lengths, but in the Elasmosauridae broadly separated posteriorly by a deep emargination, apparently a specialization (Fig. 110).
Fig. 109. Pectoral girdles: A, Nyctosaurus (Pterosauria). One half natural size. B, C, Testudo (Chelonia). One half natural size. D, Stegochelys (Chelonia). After Jaekel. One fourth natural size.
In most reptiles the single coracoid is fused with the scapula in
