. A monograph of the Mycetozoa, being a descriptive catalogue of the species in the herbarium of the British Museum. Illustrated with seventy-eight plates and fifty-one woodcuts. Myxomycetes. INTEODUCTION. 9 proved by the case described by me in Journ^ Linn. Soc, vol. XXIX., p. 541. In that instance a plasmodium of B. utri- culans growing on Aurimlaria mesenterica partly spread in a network of veins over two large coverslips; the films were killed with Plemming's fluid, stained with safranin, and mounted in Canada balsam. In these two preparations the nuclei are seen to be dividing by karyokin
. A monograph of the Mycetozoa, being a descriptive catalogue of the species in the herbarium of the British Museum. Illustrated with seventy-eight plates and fifty-one woodcuts. Myxomycetes. INTEODUCTION. 9 proved by the case described by me in Journ^ Linn. Soc, vol. XXIX., p. 541. In that instance a plasmodium of B. utri- culans growing on Aurimlaria mesenterica partly spread in a network of veins over two large coverslips; the films were killed with Plemming's fluid, stained with safranin, and mounted in Canada balsam. In these two preparations the nuclei are seen to be dividing by karyokinegis; the stages represented are the" nuclear spindle, and where the nuclear plate has divided and the two halves are connected by achromatic fibres. Part of the same Plasmodium spread over another covershp, and was killed and stained with the others. The nuclei in this preparation have the appearance most commonly met with, containing a central nucleolus, and without any indication of karyokinetic division. The main body of the plasmodium continued to creep over the Auricularia for several days after these observations had been made. This experiment affords clear evidence that under certain conditions the nuclei of the actively streaming plasmodium divide by karyokinesis, but what; these conditions are re- mains at present unexplained. The process no doubt is a rapid one, occupying about half an hour; but the follow- ing observations confirm the conclusion arrived at from many_ previous experiments, p,g. uteioitlaeis Berk. that it is not the only way Group of nuclei from actively feeding by which the nuclei increase Plasmodium that covered two pilei of . "^ 1 k c ±.1 ji AnHculai'ia in foui'teen hours, showing the m number. A turther growth irregular size of the nuclei and large nucleoli. of the Plasmodium already re- in cmadt MsaS°""°''™^° *°'* mounted ferred to as increasing sixfold in Magnified 1200 times, twenty hours, sj^ead over two
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmyxomyc, bookyear1894
