. The anatomical record. Anatomy; Anatomy. HYPOPHYSIS OF TAILED AMPHIBIA 379 the pars intermedia, a cup-shaped structure is formed. The pars intermedia is situated dorsal to the anterior lobe and at some distance forward from its caudal extremity. The neural lobe is apparent as a thickening of the part of the infundibular wall adjacent to the pars intermedia. The two bud-like por- tions of the pars tuberalis grow forward, becoming more elon- gated (fig. 6). The 60-mm. larva shows a considerable increase. ant. I. Fig. 6 Ventral view of a wax-plate reconstruction of the h^'pophysis from a 40-mm.
. The anatomical record. Anatomy; Anatomy. HYPOPHYSIS OF TAILED AMPHIBIA 379 the pars intermedia, a cup-shaped structure is formed. The pars intermedia is situated dorsal to the anterior lobe and at some distance forward from its caudal extremity. The neural lobe is apparent as a thickening of the part of the infundibular wall adjacent to the pars intermedia. The two bud-like por- tions of the pars tuberalis grow forward, becoming more elon- gated (fig. 6). The 60-mm. larva shows a considerable increase. ant. I. Fig. 6 Ventral view of a wax-plate reconstruction of the h^'pophysis from a 40-mm. larva of Ambystoma. Caudal end is below, , brain wall; , pars tuberalis; an^L, anterior lobe. X 100. in the size of all parts of the gland, but the enlargement of the anterior lobe proper is especially apparent. Adult Ambystoma jeffersonianum. The hypophysis of the adult ambystoma is shown in sagittal section in figure 7. Three views of the wax-plate reconstruction are given in figures 8, 9, and 10. The anterior lobe proper is seen to be the most caudal portion of the gland. The name 'anterior lobe,' therefore, has not been applied because of the relative position of the part in the adult amphibian, but because of its homology to the cor- responding lobe in the higher vertebrates. Both sections and. 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 Bardeen, Charles Russell, 1871-1935, ed; Boyden, Edward A. (Edward Allen), 1886-1976; Bremer, John Lewis, 1874- ed; Hardesty, Irving, b. 1866, ed; American Association of Anatomists; American Society of Zoologists; Wistar Institute of Anatomy and Biology. [New York, etc. ] A. R. Liss [etc. ]
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
