. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. 720 THE MUSCULAR SYSTEM In tetrapod vertebrates, however, the exact origin of the cells which enter into the formation of the limb's intrinsic musculature is open to question. In the amphibia, including Urodela and Aniira, Field (1894) described myo- tomic processes which contribute to the musculature of the anterior limbs. Byrnes (1898), working experimentally with the same group, and W. H. Lewis ('10b) deny this conclusion and affirm the somatop
. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. 720 THE MUSCULAR SYSTEM In tetrapod vertebrates, however, the exact origin of the cells which enter into the formation of the limb's intrinsic musculature is open to question. In the amphibia, including Urodela and Aniira, Field (1894) described myo- tomic processes which contribute to the musculature of the anterior limbs. Byrnes (1898), working experimentally with the same group, and W. H. Lewis ('10b) deny this conclusion and affirm the somatopleural or in situ. HOMOCERCAL TYPE ( CYPRINUS CARPIO 1 (GERMAN CARPI ETEROCERCAl type ^ scaphirhyncmus ) Fig. 331. (A) Innervation of premuscle masses in head and pharyngeal areas, and of myotomes in the cervical and caudal head regions of 7-mm. human embryos. Four post-otic (occipital) myotomes and the premuscle mass of the trapezius and sterno- mastoid muscles are shown just back of the tenth cranial nerve. The first cervical myotome and spinal nerve are shown just posterior to the fourth occipital myotome. (Redrawn from W. H. Lewis, 1910, chap. 12 in Manual of Human Embryology, vol. I, by F. Keibel and F. P. Mall, Philadelphia, Lippincott.) (B, C, D) Types of caudal fins in 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 Nelsen, Olin E. (Olin Everett), b. 1898. New York, Blakiston
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