Elements of the comparative anatomy Elements of the comparative anatomy of vertebrates elementsofcompar00wied Year: 1886 PECTOPvAL ARCH. 89 extensively developed. In all the higher Vertebrates it is formed on the same plan as in Amphibia, and becomes more or less completely ossified. It always consists on each side of a cartilaginous or bony dorsal plate (scapula), which curves round the side of the body, and becomes continuous ventrally with two processes—an anterior FIG. 71.—DIAGRAM OF THE GROUND-TYPE OF PECTORAL ARCII MET WITH ix ALL VERTEBRATA, FROM THE AMPHIBIA UP TO MAMMALIA. 8, scap
Elements of the comparative anatomy Elements of the comparative anatomy of vertebrates elementsofcompar00wied Year: 1886 PECTOPvAL ARCH. 89 extensively developed. In all the higher Vertebrates it is formed on the same plan as in Amphibia, and becomes more or less completely ossified. It always consists on each side of a cartilaginous or bony dorsal plate (scapula), which curves round the side of the body, and becomes continuous ventrally with two processes—an anterior FIG. 71.—DIAGRAM OF THE GROUND-TYPE OF PECTORAL ARCII MET WITH ix ALL VERTEBRATA, FROM THE AMPHIBIA UP TO MAMMALIA. 8, scapula ; Co, coracoid ; 67, precoracoid (clavicle) ; H, humerus.
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