. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. REPTILIA. 271 bones, the larger of which (c) supports the metatarsals of the fourth and fifth toes, whilst the smaller (cl) is situated between the preceding and the metatarsal bones of the second and third toes. This latter is also slightly connected with the astragalus, which alone supports the metatarsal bone of the internal or representative of the great toe. The four first metatarsal bones are slender and nearly straight, becoming progressively longer as far as the fourth. The fifth is short, wide, and curved superi
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. REPTILIA. 271 bones, the larger of which (c) supports the metatarsals of the fourth and fifth toes, whilst the smaller (cl) is situated between the preceding and the metatarsal bones of the second and third toes. This latter is also slightly connected with the astragalus, which alone supports the metatarsal bone of the internal or representative of the great toe. The four first metatarsal bones are slender and nearly straight, becoming progressively longer as far as the fourth. The fifth is short, wide, and curved superiorly towards the larger of the two bones of the second row (c), to the side of which it is articulated. The thumb or internal toe consists of two phalanges, the second of three, the third of four, and the fourth of five ; this is the longest toe in the foot of a lizard, giving to it the peculiar elongated and unequal form by which it is immediately distinguished. The fifth toe, although almost as short as the first, is composed of four phalanges. The ungueal phalanges of all the toes are sharp, hooked, and pointed. The above description, with slight dif- ferences as to the proportions, is applicable to all those subgenera of lizards which have their limbs fully developed, with the exception of the Chameleons and certain Geckos. Even in the chameleon it is the proportions Fig. Anterior Extremity of the Chameleon. of the carpal and tarsal bones that differ, rather than their number or arrangement. The five bones of the last row of the tarsus are very large and oblong, instead of being flattened. In the state of pronation and torsion in which the foot is placed, the os pi- siforme is attached to the inner margin ofthe ulna, between it and the radius. The ulnar carpal bone (fig 188, d) and the radial (c) are small, the central bone (<?) being the largest of all, and around this the five carpal bones of the last row are arranged like the spokes of a wheel. These five bones
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