. Report of the Commissioner - United States Commission of Fish and Fisheries . Report U. S. F. C. 1889 to 1891. (To face p. 564, Plate n-PLANKTONIC STUDIES: A COMPARATIVE INVESTIGATIONOF THE IMPORTANCE AND CONSTITUTION OF THE PELAGICFx\UNA AND FLORA. By Ernst [Translated by George Wilton Field.] TRANSLATORS PREFACE. Prof. Hteckels Plankton-Studien first appeared in the JenaischeZeitschHft, vol. xxv, first and second parts, 1890. It was immediatelypublished in separate form by Gustav Fischer, of Jena, and attractedmuch attention on the Continent and in Enfjland. The subject, acomp
. Report of the Commissioner - United States Commission of Fish and Fisheries . Report U. S. F. C. 1889 to 1891. (To face p. 564, Plate n-PLANKTONIC STUDIES: A COMPARATIVE INVESTIGATIONOF THE IMPORTANCE AND CONSTITUTION OF THE PELAGICFx\UNA AND FLORA. By Ernst [Translated by George Wilton Field.] TRANSLATORS PREFACE. Prof. Hteckels Plankton-Studien first appeared in the JenaischeZeitschHft, vol. xxv, first and second parts, 1890. It was immediatelypublished in separate form by Gustav Fischer, of Jena, and attractedmuch attention on the Continent and in Enfjland. The subject, acomparative study of the importance and constitution of the marinefauna and flora, is presented in Prof. Ha^ckels usual pleasing style,and the work can not fail to be of value to all interested in the bio-logical sciences, to the general reader as well as to the specialist. Itderives especial interest in connection with the work of the Fish Com-mission, from its broad discussion of tliose many imi)ortant elementswhich enter into the food supply of all pelagic fishes, such as themackerel and menhaden, and, considering the extensive physica
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