. Comparative anatomy. Anatomy, Comparative. 620 COMPARATIVE ANATOMY nervous system. In annelids and arthropods each metamere typically contains a well-marked ganglion which serves as a nerve center for the segment. In some arthropods in which the metameres have been tele- scoped together, the original segmentation is still represented in a series of metamerically arranged gangUa. Here the neuromeric segmentation persists when other signs of metamerism are all lost. The fact of the transiency of vertebrate neuromeres has not counted against their value as criteria of segmentation, but in their

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. Comparative anatomy. Anatomy, Comparative. 620 COMPARATIVE ANATOMY nervous system. In annelids and arthropods each metamere typically contains a well-marked ganglion which serves as a nerve center for the segment. In some arthropods in which the metameres have been tele- scoped together, the original segmentation is still represented in a series of metamerically arranged gangUa. Here the neuromeric segmentation persists when other signs of metamerism are all lost. The fact of the transiency of vertebrate neuromeres has not counted against their value as criteria of segmentation, but in their favor, as vanishing remnants of the metamerism of invertebrate 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son

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Keywords: ., bookcentury1900, bookpublisherphi, booksubjectanatomycomparative