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- W622605092 abstract "THE Prussian Minister of Agriculture has just published Part I. of the Report of the Commission appointed to inquire into the scientific conditions of the German Ocean at Kiel (for the years 1872, 1873). This Report forms a very important document, filling a small folio volume of 170 pages, with 12 plates and a chart. The editors are Drs. H. A. Meyer, K. Möbius, G. Karsten, V. Hensen, and C. Kupffer. The Report on the currents, temperature, and specific gravity of the sea-water, based on 255 observations made from July 21 to Sept. 9, 1872, is by Dr. H. A. Meyer, and to it there is appended a memoir “On the Air in Sea-water,” by Prof. Dr. Oscar Jacobsen. The marine flora of the district is reported on by Drs. Magnus and Schmidt, The only Phanerogams met with were Zostera marina and Z. nana, and Potamogeton pectinatus. Of Algæ, excluding the Diatoms, 116 species are recorded. Of these, Callithamnion membranaceum and Chytridium tumefaciens are described by Dr. Magnus as new species; the former was found growing over the stems of Sertularia abietina, between Sprogoe and Corsoer, in from twenty to thirty fathoms, the latter protruding from the cells of Ceramium flabelligerum; these new species are well illustrated in two plates. The presence of claspers is noticed in Plocamium coccineum intertwining between Annelid tubes. Hilde-brandtia rosea, Kütz., is held to be quite a distinct form from H. rubra, Meneg., though by Harvey it and H. sanguinea, Kütz., were all regarded as one and the same thing. Hapalidium confervicola, Kütz, is recorded, but nothing added to clear up our ignorance of this curious little alga. Bonnemaisonia asparagoides, Ag., was found bearing both Conceptacles and Antheridia on the same stem. Myrionema orbiculare, J. Ag., is the name given with much doubt to a form found very common on the sea-grass. The plant is not figured, but appears to differ from any known species of Myrionema: if proved to be generically distinct, the author proposes the name Ascocylus for a genus to receive it. Chytridium tumefaciens is described as a new species, growing on the root-hairs and stem-cells of Ceramium flabelligerum, taken near Edinburgh. In the description of this species and in the details given about Ch. plumulœ, Cohn, the interesting question turns up as to what these Chytridia really are. Magnus treats them as a family of Algæ; Henfrey always, we believe, regarded them rather as the products of diseased protoplasm, if not modifications of the antheridial structures of some of the Confervoids. Their apparently common occurrence on Florideæ as well as on Confervoids, ought to enable this question to be definitely answered. Magnus is satisfied that the so-called Antheridea of Callithamnion dispar figured by Harvey in Tab. 227 of the “Phycologia Australica,” are only Chytridia; certainly the figures represent a very antheridium-like structure, and the original dried specimen from which the figure was drawn is marked “fruit of an abnormal character,” and on examination proves rather to favour Magnus's view. Jahresbericht der Commission zur wissenschaftlichen Untersuchung der deutschen Meere in Kiel für die Jahre 1872, 1873. Im Auftrage des Königlich Preussischen Ministeriums für die landwirthschaftlichen Angelegenheiten, herausgegeben von Dr. H. A. Meyer Dr. K. Möbius Dr. G. Karsten Dr. V. Hensen Dr. C. Kupffer. I Abtheilung. (Berlin, 1875.)" @default.
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- W622605092 date "1875-12-01" @default.
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- W622605092 title "Jahresbericht der Commission zur wissenschaftlichen Untersuchung der deutschen Meere in Kiel für die Jahre 1872, 1873. Im Auftrage des Königlich Preussischen Ministeriums für die landwirthschaftlichen Angelegenheiten" @default.
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