. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 196 CATHERINE HENLEY DISCUSSION From the foregoing results, it is apparent that the main effect of the lithium is to produce a reduction in the number of prototrochal cells, and in the quantity of anal and prototrochal pigments, together with effects on the eye spots and cilia. The absence of the apical tuft in most cases of prolonged or concentrated treatment indi- cates that the la-Id cells may be affected directly or indirectly, since it is known from the observations of Wilson (1892) that this quartet is associated with
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 196 CATHERINE HENLEY DISCUSSION From the foregoing results, it is apparent that the main effect of the lithium is to produce a reduction in the number of prototrochal cells, and in the quantity of anal and prototrochal pigments, together with effects on the eye spots and cilia. The absence of the apical tuft in most cases of prolonged or concentrated treatment indi- cates that the la-Id cells may be affected directly or indirectly, since it is known from the observations of Wilson (1892) that this quartet is associated with the formation. 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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