. Fishes. Fishes. Fig. Fig. 57. Figs. 56, 57.—Larval stages of Ptoop/irj/s podas, a flounder of the Mediterranean, showing the migration of the eye. (After Emery.) flounder {Pseudopleuronectes americanus) Mr. Stephen R. Wil- liams reaches the following conclusions: 1. The yoimg of Limanda ferruginea (the rusty dab) are probably in the larval stage at the same time as those of Pseu- dopleuronectes americanus (the winter flounder). 2. The recently hatched fish are symmetrical, except for the relative positions of the two optic nerves. 3. The first observed occurrence in preparation for meta
. Fishes. Fishes. Fig. Fig. 57. Figs. 56, 57.—Larval stages of Ptoop/irj/s podas, a flounder of the Mediterranean, showing the migration of the eye. (After Emery.) flounder {Pseudopleuronectes americanus) Mr. Stephen R. Wil- liams reaches the following conclusions: 1. The yoimg of Limanda ferruginea (the rusty dab) are probably in the larval stage at the same time as those of Pseu- dopleuronectes americanus (the winter flounder). 2. The recently hatched fish are symmetrical, except for the relative positions of the two optic nerves. 3. The first observed occurrence in preparation for meta- morphosis in P. americanus is the rapid resorption of the part of the supraorbital cartilage bar which lies in the path of the eye. 4. Correlated with this is an increase in distance between. 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 Jordan, David Starr, 1851-1931. New York, H. Holt and Company
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