. A manual of zoology. PHYLUM CHORDATA 4/1 backwards from their dorsal or acetabular ends, and lie nearly parallel. Neither is- chium nor pubis unites ven- trally with its fellow to form a symphysis. In the hind-limb the femur (Fig. 2&^,fe) is a compara- tively short bone. Its proxi- mal extremity bears a promi- nent trochanter (tr) and a rounded head (hd). Its dis- tant end is produced into pulley-like condyles. Articu- lating with the femur is a very long bone, the tibio- tarsus (ti. ts) ; its distal end is pulley-like, not concave like the corresponding ex- tremity of the tibia of other
. A manual of zoology. PHYLUM CHORDATA 4/1 backwards from their dorsal or acetabular ends, and lie nearly parallel. Neither is- chium nor pubis unites ven- trally with its fellow to form a symphysis. In the hind-limb the femur (Fig. 2&^,fe) is a compara- tively short bone. Its proxi- mal extremity bears a promi- nent trochanter (tr) and a rounded head (hd). Its dis- tant end is produced into pulley-like condyles. Articu- lating with the femur is a very long bone, the tibio- tarsus (ti. ts) ; its distal end is pulley-like, not concave like the corresponding ex- tremity of the tibia of other Amniota. The studv of its development shows that the pulley-like distal end of the bone (Fig. 285, t/1) con- sists of the proximal tarsals, — astragalus and calcaneum, — which at an early period unite with the tibia and give rise to the compound shank- bone of the adult. The fibula (Fig. 284,7?) is very small, much shorter than the tibia, and tapers to a point at its distal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
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