. Comparative anatomy. Anatomy, Comparative. THE HEAD PROBLEM 619 In the light of the evidence we are compelled to add another segment to those enumerated by van Wijhe, so as to make eleven segments in the elasmobranch head, instead of the ten recognized by Goodrich. F ^ Yi w in I ! â - ACUSflCO-FACIALlS GANGLION . 3Ssr7SB»cJs8«4Sfe*Ci:^ ' f-SOM Fic;. 512.âA parasagittal section of a 33-hour chick embryo showing the brain neuro- meres. The neuromeres are indicated by Roman numerals. Among the criteria used to determine head segmentation, some morphologists have leaned heavily upon the
. Comparative anatomy. Anatomy, Comparative. THE HEAD PROBLEM 619 In the light of the evidence we are compelled to add another segment to those enumerated by van Wijhe, so as to make eleven segments in the elasmobranch head, instead of the ten recognized by Goodrich. F ^ Yi w in I ! â - ACUSflCO-FACIALlS GANGLION . 3Ssr7SB»cJs8«4Sfe*Ci:^ ' f-SOM Fic;. 512.âA parasagittal section of a 33-hour chick embryo showing the brain neuro- meres. The neuromeres are indicated by Roman numerals. Among the criteria used to determine head segmentation, some morphologists have leaned heavily upon the so-called neuromeres or segments of the central nervous system. Neuromeres are evanescent 'NEURAL CREST CELLS/ NEUROMERES. 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
