. Text-book of zoology for schools and colleges. Zoology. AVES. 257 form the wrist or carpus (g'), but these are reduced to two in number. The carpus is followed by the bones which con- stitute the root of the hand or metacarpus (wi), but these are also reduced to two, instead of being five in number, as they are in most Mammals. The two metacarpal bones are also amalgamated together at both ends, so as to form a single piece, at the base of which, on its outer side, is a rudimentary digit, the "thumb" (<), which carries a tuft of feathers, known as the "bastard ; T
. Text-book of zoology for schools and colleges. Zoology. AVES. 257 form the wrist or carpus (g'), but these are reduced to two in number. The carpus is followed by the bones which con- stitute the root of the hand or metacarpus (wi), but these are also reduced to two, instead of being five in number, as they are in most Mammals. The two metacarpal bones are also amalgamated together at both ends, so as to form a single piece, at the base of which, on its outer side, is a rudimentary digit, the "thumb" (<), which carries a tuft of feathers, known as the "bastard ; The metacarpal bones, finally, sup- port each a single finger (/)), of which one is never composed of more than one bone or phalanx, while the other is com- posed of two or three phalanges. (To understand thoroughly the leading modifications of the limbs of birds, the student will do well to refer to the general description of the limbs of Vertebrates, p. 200, Figs. 96, 97.) As regards the composition of the hind-limb in birds, the two halves of the pelvic arch (i. e., the innominate bones) al-. FiG. 129.—A, Pel™ and bones of the Leg of the Loon or Diver (after Owen): i Innominata bone; / Thigh-bone {femur); t Tibia, r fibula, together forming the shank; m Tarso- metatarsne; p Phalanges of the toes. B, Tail of the Golden Eagle; a Ploughshare- shaped bone, canying the great 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 Nicholson, Henry Alleyne, 1844-1899. New York, D. Appleton and Co.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
