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. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Fig. 531. The pectoral girdle and sternum of a European toad, Bombi- nator, showing the clavicle taking the place of the procoracoid. The left suprascapular cartilage and scapula (in the right-hand portion of the figure) are in natural position; the right ones have been swung ventrally. (After Wiedersheim.) (b) Pelvic Girdle.—Unlike the pectoral girdle the pelvic girdle has nothing corresponding to the thoracic basket with which to become involved. It is c
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. Fig. 531. The pectoral girdle and sternum of a European toad, Bombi- nator, showing the clavicle taking the place of the procoracoid. The left suprascapular cartilage and scapula (in the right-hand portion of the figure) are in natural position; the right ones have been swung ventrally. (After Wiedersheim.) (b) Pelvic Girdle.—Unlike the pectoral girdle the pelvic girdle has nothing corresponding to the thoracic basket with which to become involved. It is concerned solely with its hook-up to the vertebral column. Like its pec- toral homologue it consists typically of three parts, a dorsal element, the ilium, and two ventral elements, of which the pubis is anterior and the ischium posterior, forming tripods on either side for the articulation of the hind legs (Fig. 529). All three pairs of pelvic girdle bones are replacing in Propterygium / /Metapterygium / / Jschiopubic Bar. "Actinorrichia Fig. 532. Evolution of the pelvic girdle in fishes, a, a fossil elasmo- branch, Pleuracanthus; b, a chondrostean, Acipenser; c, a modern dogfish, Squalus. (a and b, after Goodrich.). 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 Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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Keywords: ., bookcentury1900, booksubjectanatomycomparative, booksubjectverte