Abstract
The Monthly Microscopical Journal, for this month, contains four papers, besides the notes, record of the progress of Microscopical Science and the Proceedings of the Royal Microscopical Society.— Mr. S. J. Mclntire, in Notes on so-called Acanllus, discusses the point whether the specimens described and named A. muscæ and A. pulicis, by Mr. Tatem, are related to a form known by him as a parasite on Obisium, and elsewhere; and whether it is one of the early forms of Gamasus, as thought by Mr. Tatem and Dujardin, though not by himself. —A second paper by Mr. W. H. Dallinger and Dr. J. Drysdale, contains further researches into the life-history of the Monads. The importance of prolonged study of the same form is insisted on, and this shows that the method of multiplication is not, as generally supposed, entirely by fission, but sometimes by an absorption into one of two individuals, the resulting mass clearing like an ovum, and giving rise, somewhat as in Gregarina, to a multitude of new individuals. Sometimes more than two, as many as four or six, were observed to unite.—Prof. E. Hull describes the microscopic structure of a granitoid quartz-porphyry from Galway, in which “the silica has consolidated into individual sub-crystalline grains before the other minerals, whereas in all true granites the silica has been the last to consolidate. The presence of aqueous (?) vapour during the consolidation of this rock is shown by the existence of numerous fluid cavities, and is another feature in which it resembles true granites.”—Mr. G. W. Morehouse's paper on the structure of the scales of Lepisma saccharina, is reprinted from the American Naturalist.
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Scientific Serials . Nature 9, 214 (1874). https://doi.org/10.1038/009214a0
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DOI: https://doi.org/10.1038/009214a0