. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. Fig. 157. Ster- num of dog, show- ing Fig. 158. Shoulder girdle of Ornithorhynchus. C, clavicle; CO, coracoid; E, episternum; £C, epi- coracoid; S, scapula; ST, sternum; R, ribs. Connected with the sternum in many groups is a structure to which the name episternum has been given. This first appears in the stegocephali, but reaches its highest development in the reptiles. It forms usually an unpaired plate connected with the median ends of the clavicles, and in those reptiles where it occurs it is placed ventrall
. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. Fig. 157. Ster- num of dog, show- ing Fig. 158. Shoulder girdle of Ornithorhynchus. C, clavicle; CO, coracoid; E, episternum; £C, epi- coracoid; S, scapula; ST, sternum; R, ribs. Connected with the sternum in many groups is a structure to which the name episternum has been given. This first appears in the stegocephali, but reaches its highest development in the reptiles. It forms usually an unpaired plate connected with the median ends of the clavicles, and in those reptiles where it occurs it is placed ventrally to the sternum proper. It is expanded in front, and frequently takes the shape of a T, the arms supporting the clavicles, while the shaft connects with or may even be fused with the sternum proper. No episternum. 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 Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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