Page:The Osteology of the Reptiles.pdf/210

The calcaneum of the Crocodilia (Fig. 157 a, b) is produced into a heel-like process; the first and fifth tarsalia and the centrale are absent, the second tarsale is small. Hallopus (Fig. 155 b), usually referred to the Dinosauria, also has a heel-like calcaneum, as is the case in Scleromochlus, and other genera of the Pseudosuchia, Araeoscelis (Fig. 155 a), Broomia (Fig. 137 d), and other leaping or springing reptiles.

Fig. 157. Crocodilian limbs: A, B, left hind limb of Alligator, dorsal and postaxial; C, left femur dorsal; D, Alligatorellus. After Lortet. About three fourths natural size.