. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. Cuh-. FiG. 113.—A, Cakpus, and B, Skeleton of the Foot of Max. (The rudiments of the so-called prepoUex and prehallux (itf) are represented diagram- matically. TJ, ulna ; i?, radius ; r, radiale ; i, intermedium ; )(, ulnare ; P, pisiform ; ce, centrale, fused with the radiale ; ce"-, second centrale, forming the head of tarsale 3 ; 1-5, the carpalia and tarsalia, 4 and 5 being united to form the unciform and cuboid respectively ; Cii I-III, the first to third tarsalia ; c, centrale tarsi (navicular) ; it, interme
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. Cuh-. FiG. 113.—A, Cakpus, and B, Skeleton of the Foot of Max. (The rudiments of the so-called prepoUex and prehallux (itf) are represented diagram- matically. TJ, ulna ; i?, radius ; r, radiale ; i, intermedium ; )(, ulnare ; P, pisiform ; ce, centrale, fused with the radiale ; ce"-, second centrale, forming the head of tarsale 3 ; 1-5, the carpalia and tarsalia, 4 and 5 being united to form the unciform and cuboid respectively ; Cii I-III, the first to third tarsalia ; c, centrale tarsi (navicular) ; it, intermedio-tibiale = astragalus {As) ; f + p, calcaneum (= fibulare and pisiform tarsi?); I-V, the metacarpals and metatarsals. 115), the disappearance taking place in the following order— 1, 5, 2, 4 : thus in the horse the third is the only complete digit remaining (Fig. 115). The number of phalanges is similar in both hand and foot: in the first digit there are only two, while in the others there are three. An exception to this rule is seen in Cetacea, in which the phalanges are numerous, as in Ichthyosaurus and Plesiosaurus amongst Reptiles. It is interesting to trace the reduction which has taken place in the feet of Ungulates in the course of time. Fig. 115 represents successive stages in the. 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 Wiedersheim, Robert, 1848-1923; Parker, William Newton, 1857-1923. London, Macmillan
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
