THE reports issued by the Danish section of the International Fisheries Investigation Organisation deal to a greater extent with purely biological matters than do the publications of the corresponding British committee. Thus of the present instalment of reports two relate to hydrographical researches, one to plankton studies, while five deal with the lifehistories of species of fishes of economic importance. Meddelelser fra Kommissionen fra Havundersogelsen. Serie Hydrografi, Bd. i., Nos. 7–8; Serie Fiskeri, Bd. i., Nos. 4–8; Serie Plankton, Bd. i., No. 3. (Kobenhavn, 1 Kommission Hos C. A. Reitzel, 1905.)