. The crustacea of the plankton, July, 1894-Dec., 1896 . based on the vertical net. In most of these lists, the preponderance of Cyclops in theupper stratum is striking. In A, all of the Diaptomi at and1 m. were young. The same was true of D. hyalina at m.,and above. In all catches 85-95 per cent, were young at 1 m. onsunny days. The effect of cloud is plainly visible in B, C, andF, and of wind in E and G-. The tendency of Gloiotrichia toaggregate at the surface is well seen in B. In the following tables the record for two more complete ob-servations is given, together with one illustr
. The crustacea of the plankton, July, 1894-Dec., 1896 . based on the vertical net. In most of these lists, the preponderance of Cyclops in theupper stratum is striking. In A, all of the Diaptomi at and1 m. were young. The same was true of D. hyalina at m.,and above. In all catches 85-95 per cent, were young at 1 m. onsunny days. The effect of cloud is plainly visible in B, C, andF, and of wind in E and G-. The tendency of Gloiotrichia toaggregate at the surface is well seen in B. In the following tables the record for two more complete ob-servations is given, together with one illustration of a nightdistribution. In the latter there were almost no nauplii, anexception to what has usually been found at night. The popu-lation for the given depths in the catch of September 8th hasbeen platted in Fig. 33, and Fig. 32 shows the upper threemeters of the two sets of observations on September 13. Trans. Wis. Acad., Vol. XL Plate XL1L 20 40 60 80 100 120 140 160 180 200 220 Nauplii. Depth. 10 20 30 40 50 60 70 80 90 100 110 Crustacea. 0
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