. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. Fig. 73.—Nest of the Heterotis. After Budgett. As soon as they are released they strike out from the bottom, and, the day after hatching, "may be seen continually parsing up and ; The next day '' they cease to pass up and down, and converg- ing to a swarm about one foot in diameter, form a deep continuous circle remarkable for its regularity and persistence. The swarm occu- pies the exact center of the little lagoon. The youn
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. Fig. 73.—Nest of the Heterotis. After Budgett. As soon as they are released they strike out from the bottom, and, the day after hatching, "may be seen continually parsing up and ; The next day '' they cease to pass up and down, and converg- ing to a swarm about one foot in diameter, form a deep continuous circle remarkable for its regularity and persistence. The swarm occu- pies the exact center of the little lagoon. The young fry, which by now have lost the long external gill filaments, are seen to be steadily. Pig. 74.—Heterotis nilotirus, larva, a clay after hatehinu After Budget. careering round and round, ever in the same direction, for at least a day. About the fourth day the swarm becomes less persistent and regular, the larva^ swimming first to one side of the nest and then to the other, until about the fifth day they leave the nest by the exit for a few trial trips, attended hy the parent, and finally leave it altogether, swimming hither and thither in a dense swarm, from which the par-. 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 Smithsonian Institution. Board of Regents; United States National Museum. Report of the U. S. National Museum; Smithsonian Institution. Report of the Secretary. Washington : Smithsonian Institution
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