. Annals of the New York Academy of Sciences. Science. Fig. 3.—Eel larva. September 15 color, brownish orange, appears on the ventral body wall, just behind the gill opening (jugular villi). September 18. The larval length and breadth are rapidly becoming reduced (Fig. 5). The caudal fin and dorsal ridge appear. The colored jugular patch has now de- veloped into a velvety mass of lighter color, and possibly serves as a larval adhesive organ, which hangs freely in the water. The intestine can be outlined. Pigmenta- tion is noted, especially along the lateral line and on the head-roof, and the e
. Annals of the New York Academy of Sciences. Science. Fig. 3.—Eel larva. September 15 color, brownish orange, appears on the ventral body wall, just behind the gill opening (jugular villi). September 18. The larval length and breadth are rapidly becoming reduced (Fig. 5). The caudal fin and dorsal ridge appear. The colored jugular patch has now de- veloped into a velvety mass of lighter color, and possibly serves as a larval adhesive organ, which hangs freely in the water. The intestine can be outlined. Pigmenta- tion is noted, especially along the lateral line and on the head-roof, and the en- tire fish has a faint purplish tone. It remains more often at the surface than before, here occasionally floating and swimming on its side, now and then thrusting its head out of water. It remains longer in one position than heretofore. If disturbed (head touched), it will wriggle its head backward,—and does not initiate the backward movement from the tail as in the earliest stage. September 19. Changes progress rapidly (Fig. 6). The coloration is distinctly purple, with whitish spots near the tail, and pigment patches on the ventral wall of the head and within the neural axis. Vertebra. Fig. 4.—Eel larva. Position in swimming. 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 New York Academy of Sciences. New York, New York Academy of Sciences
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1877
