. Annual report - New York Zoological Society. Zoology. 118 NEW YORK ZOOLOGICAL COPPERHEAD, ANCISTRODON CONTORTRIX on ichthyology. It is often important to ascertain the num- ber of vertebrae in fishes for purposes of classification, and these can usually be counted without difficulty in a radiograph. The natural curve of the backbone—seldom seen correctly in prepared skeletons of fishes—is well shown. The character of the caudal vertebrae showing the heterocercal or homocercal type of tail is seen very clearly. The radiograph is really a shadow picture made with the object laid flat
. Annual report - New York Zoological Society. Zoology. 118 NEW YORK ZOOLOGICAL COPPERHEAD, ANCISTRODON CONTORTRIX on ichthyology. It is often important to ascertain the num- ber of vertebrae in fishes for purposes of classification, and these can usually be counted without difficulty in a radiograph. The natural curve of the backbone—seldom seen correctly in prepared skeletons of fishes—is well shown. The character of the caudal vertebrae showing the heterocercal or homocercal type of tail is seen very clearly. The radiograph is really a shadow picture made with the object laid flat upon the dry plate, the oste-. 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 New York Zoological Society. New York, The Society
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Keywords: ., bookauthorne, bookcentury1900, bookdecade1900, booksubjectzoology
