. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CNP. — NE Figiue 21. Chrysemys 1085 (; MC). Sagittal sections through the nasal area. A, section 91; B, 10 sections medial to A; and C, 8 medial to B. 23x. this stage the transition is quite abrupt. Medially, the entire wall of the cavum is thick, but a line of demarcation is starting to develop between the regiones. Most commonly this is simply a horizontal line of thinner epithelium appearing as a groove along the basal surface of the epithelium. Occasionally there are two such grooves wdth a third parallel groov
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CNP. — NE Figiue 21. Chrysemys 1085 (; MC). Sagittal sections through the nasal area. A, section 91; B, 10 sections medial to A; and C, 8 medial to B. 23x. this stage the transition is quite abrupt. Medially, the entire wall of the cavum is thick, but a line of demarcation is starting to develop between the regiones. Most commonly this is simply a horizontal line of thinner epithelium appearing as a groove along the basal surface of the epithelium. Occasionally there are two such grooves wdth a third parallel groove between them in the superficial edge of the epithelium (see Fig. 20B). There is also a developing tendency for the lumen to be wider in the regio intermedialis than further dorsally. The regio olfactoria reaches farther ventrally on the lateral than the medial wall. The cavum is in general closer to the midline anteriorly than posteriorly. This is most marked dorsally where the lumina of. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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