This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 edition. Excerpt: ...thick membranes of a deep and often a dark brown colour. The Laboulbenieae have no mycelium; the ripe double spore attaches itself by one extremity to the chitinous covering of the insect, and sends into it a small short point, which sometimes enlarges into a knob at its extremity and with the surrounding ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 edition. Excerpt: ...thick membranes of a deep and often a dark brown colour. The Laboulbenieae have no mycelium; the ripe double spore attaches itself by one extremity to the chitinous covering of the insect, and sends into it a small short point, which sometimes enlarges into a knob at its extremity and with the surrounding chitin soon assumes a brown colour; this point is its only organ of attachment and of nutrition. Thus firmly planted it developes at right angles to the substratum and reaches its mature state by the necessary successive cell-divisions and differentiations. Most of the details of these formations can be seen at once in the accompanying figure for the case which it represents, but some important points have still to be cleared up. I select the following for special notice, and refer the reader to Peyritsch's treatises for further details. The appendage is developed from the cell of the double spore which is the upper one in reference to the point of attachment; it is therefore originally terminal and is completed before the perithecium. The stalk and the perithecium are formed from the lower cell of the double spore; the perithecium shoots out laterally from beneath the point which is afterwards that of insertion of the appendage, and as it increases in breadth it thrusts the appendage to one side. In its earliest stage it is unicellular; as it grows it divides by successive transverse divisions into three tiers of one cell each, and each tier in acropetal succession then separates by longitudinal division into an axile and several parietal cells. But before the longitudinal division begins (Laboulbenia vulgaris), or before it has reached the uppermost tier-cell (Stigmatomyces), it is observed that this cell puts out a short protuberance at its...
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