. The crustacea of the plankton, July, 1894-Dec., 1896 . Fig. 12.—Crustacea, Sept. 16-30, Fig. 13— Crustacea, Sept. 16-30, Table IV and p. 315. The Annual Distribution of the Crustacea. 317 the other two leading genera. In 1896 Cyclops held a similarplace, recovering rapidly from its early summer depression andmaintaining its numbers full throughout July and the early partof August. The diagrams show further how all the species of Crustaceaincrease in September, and that the rise persists to differentdates in the later autumn. In 1895 Diaptomus showed a max-imum in late Septemb
. The crustacea of the plankton, July, 1894-Dec., 1896 . Fig. 12.—Crustacea, Sept. 16-30, Fig. 13— Crustacea, Sept. 16-30, Table IV and p. 315. The Annual Distribution of the Crustacea. 317 the other two leading genera. In 1896 Cyclops held a similarplace, recovering rapidly from its early summer depression andmaintaining its numbers full throughout July and the early partof August. The diagrams show further how all the species of Crustaceaincrease in September, and that the rise persists to differentdates in the later autumn. In 1895 Diaptomus showed a max-imum in late September, and that of Cyclops came in the firsthalf of October. In 1896 Daphnia hyalina and D. retrocurvarose together from the latter part of August to the middle ofOctober, when the former species had a period of enormous re-production, while D. retrocurva, which had produced its ephip-pial eggs, rapidly declined in number. The increase of Cyclops inthis year also continued until late October. The diagrams showfurther how all species rapidly decline in number in November,and then more slowly d
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