. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 306 LEIGH HOADLEY. sections of the lobe, in which fiber tracts appear, running for some distance across the field. Longer fiber tracts appear in the inner fiber layer. These run into the base of the lobes, through which all of the innervation of this region finds its exit. The basal por- Mesoc. FIG. 9. Cross section of a portion of the tectal part of the mesencephalon of a chick of eight days incubation. (X 180.) , external limiting membrane. , epenclymal nuclear layer. , inner fiber layer. Mesoc., m
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 306 LEIGH HOADLEY. sections of the lobe, in which fiber tracts appear, running for some distance across the field. Longer fiber tracts appear in the inner fiber layer. These run into the base of the lobes, through which all of the innervation of this region finds its exit. The basal por- Mesoc. FIG. 9. Cross section of a portion of the tectal part of the mesencephalon of a chick of eight days incubation. (X 180.) , external limiting membrane. , epenclymal nuclear layer. , inner fiber layer. Mesoc., mesocoele. , nuclear strands. , outer fiber layer. , outer nuclear layer. , vascular sheath in the mesenchyme. tion also contains fibers of the ascending and descending nerve tracts. No peripheral nerves are present. The vascularization of the region is accomplished by small vessels which enter the nervous tissue through the external limiting membrane. Bearing this general condition in mind, an examination of the sections of graft 38 A 4 shows, with a few exceptions, a conformability of its development to that of the normal. The two greater cavities of the control are represented by one large mesocoele. This is bounded by the basal and tectal portions of the grafted tissues. The basal portion gives a rather compart appearance with many fiber tracts. In the cortical n-gion tin-. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
