. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE BLINDNESS OF THE CAVE I-AI NA. 57 directly. The writer noticed not infrequently that the eyes of the cross between Fundiiliis and Menidia were normal in the beginning but appeared more abnormal the further the develop- ment progressed. We will illustrate this statement by two series of drawings. The first case is illustrated by Figs. 3 to 6. Fig. 3 shows the embryo four days old. The embryo has normally developed eyes writh lenses. The embryo's heart, which is visible in front, was not yet beating and no pigment wras for
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE BLINDNESS OF THE CAVE I-AI NA. 57 directly. The writer noticed not infrequently that the eyes of the cross between Fundiiliis and Menidia were normal in the beginning but appeared more abnormal the further the develop- ment progressed. We will illustrate this statement by two series of drawings. The first case is illustrated by Figs. 3 to 6. Fig. 3 shows the embryo four days old. The embryo has normally developed eyes writh lenses. The embryo's heart, which is visible in front, was not yet beating and no pigment wras formed. The same embryo is shown two days later in Fig. 4. The eyes instead of developing any further are less distinct. Fig. 5 is the same embryo two days later (eight days old). The eyes are /BEATING HEART. FIG. 6. hardly recognizable, it is difficult to decide without sectioning whether the lens still exists. The internal ear is distinguish- able. The heart is pulsating. Fig. 6 shows the same embryo at the age of two \veeks. Apparently the pigment is the only organ of the eye which is 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
