Ocean research and the great fisheries . other flat fishes[see p. 147 (footnote)]. 2 British Marine Food Fishes, p 366. 2 About 455,000 to the (^ 146 LEMON SOLES upon to undergo ! Little difficulty , says Mcintosh. would beencountered in hatching and rearing it under artificial circum-stances. The rate of development, no doubt, like the rate ofmcubation, varies with temperature, and again we are withoutvery badly needed data ; but in the case of the fish describedby McLitosh, which were in water of a temperature not recorded,the yolk had much diminished on the third day. On the four
Ocean research and the great fisheries . other flat fishes[see p. 147 (footnote)]. 2 British Marine Food Fishes, p 366. 2 About 455,000 to the (^ 146 LEMON SOLES upon to undergo ! Little difficulty , says Mcintosh. would beencountered in hatching and rearing it under artificial circum-stances. The rate of development, no doubt, like the rate ofmcubation, varies with temperature, and again we are withoutvery badly needed data ; but in the case of the fish describedby McLitosh, which were in water of a temperature not recorded,the yolk had much diminished on the third day. On the fourthday the mouth was gaping without any movement of the McLitosh nor Meek tells us how many days passed beforethe complete absorption of the yolk, but the latter writes thatat that time the larvae measure about 0-21 inch (5-5 mm.). The Post Larval Fry Cunninghams fry lived to the eleventh day. There is norecord of any attempt to feed them before the absorption of thesac, and no information as to what constitute favourable or. Fig. 16.—Baby lemon sole 0-25 inch (6-5 mm.) long. (Drawn by Dr. M. VLebour.) unfavourable circumstances during this all-important criticalperiod. Clark this year obtained at Plymouth nineteen littlelemon soles, varying from 6 to 18 millimetres in length. Allthese were still floating at the surface. Dr. Lebour dissectednine little fish ; the smallest of these was 7 millimetres longand had been feeding on the eggs of some copepod ; two of8 millimetres contained no perceptible food. At 9 milhmetresthey were feeding on the free-swimming larva of the copepodTemora, and up to 19 millimetres no food was found in themexcept the eggs and larvae of copepods. Her previous records show many specimens with no food, and what there is consistschiefly of very small Crustacea and unicellular organisms. Itseems evident that Pleuronedes ^nicrocephalus is incapable ofeating any large copepods, and that its diet up to the time ofmetamorphosis consists of very sm
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