Pathological mycology : an enquiry into the etiology of infective diseases / by G. Sims Woodhead and Arthur W. Hare.

  • Woodhead, German Sims, Sir, 1855-1921.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: Pathological mycology : an enquiry into the etiology of infective diseases / by G. Sims Woodhead and Arthur W. Hare. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    ment is not within the spores, but forms a powder, amidst which they He. Mycelium forms an interlacing network, as in other species. A. FUMIGATUS. 0)1 Potato, &'c.—h slate-blue coloured growth, rapidly extending as a thin paper-like pellicle over the surface of the nutrient soil. If its lateral extension be checked, the layer becomes crenated, being thrown into a series of irregular deep furrows and ridges. Its colour deepens with age to a bronze brown. In Gelatine.—Forms coloured nodules at surface, colourless spherules in centre of jelly; in the latter no spores are produced. /// Liquids.—Floats on surface as a slate-blue velvety layer. Microscopically.—As other species, except that fine granules around spores have a slate-blue colour. A. GLAUCUS.—Precisely similar to above, except that on solid media it does not form a crenated layer, but remains flat; is soft and velvety, and of a light brown colour. The colour due to powdered granules on the basidia, as in other species. A. FLAVESCENS.—Only differs from above in possessing a light yellow colour, tinged with light green, and its surface, when grown on solid media, becomes gently undulating. A. NiGRESCENS (Fig. 28, p. 69.)—A growth of a deep rusty black colour ] surface velvety, not crenated, when grown on sohd media. Colour due to dark brown pigment granules, lying as fine powder around spores. Pigment soluble in ammonia. Other characters as in three preceding species. A. FULVUS.—Growing precisely like A. glaiicus, but of a coffee colour, GENUS MUCOR. A group of species having a branched, colourless mycelium, the terminal twigs of which carry spherical sporangia. These sporangia are hollow receptacles, in which the spores are contained, like small- shot in a bomb. Differences of species are recognised by the colour of the sporangia, and by some peculiarities in the mode of growth of the mycelium. From a large list of known species the following are selected as those most commonly met with :— MucOR MUCEDO. On Potato, &'c.—A silky white growth, consisting of a tangled tuft of gUstening hairs, attaining a height of from one to one and a half inches. At the ends of these fibrils are rounded glistening bodies, at first white, but soon becoming brown, and then an intense black. These are the sporangia. In Gelatine.—Grows rapidly throughout jelly as a ghstening net- work of fibrils, the typical black sporangia only being produced when it reaches the surface.