. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 96 DIVISION I.—GENERAL MORPHOLOGY. as it was described in Peziza Sclerotiorum, &c. (Fig. 43), which is extended by stretching into a thin membrane, it becomes a question whether the thickenings in the cases we are considering are not extended in the same way into thin membranes with the expansion of the ascus, and are to be considered therefore as reserve-pieces of membrane destined to be extended and to assist in the ejection of the spores, and comparable with th
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 96 DIVISION I.—GENERAL MORPHOLOGY. as it was described in Peziza Sclerotiorum, &c. (Fig. 43), which is extended by stretching into a thin membrane, it becomes a question whether the thickenings in the cases we are considering are not extended in the same way into thin membranes with the expansion of the ascus, and are to be considered therefore as reserve-pieces of membrane destined to be extended and to assist in the ejection of the spores, and comparable with the ring of cellulose in the vegetative cells of CEdogonium; the matter at least deserves inquiry. Thickenings of the apex such as those that have been described occur also in the asci of many Pyrenomycetes, in which ejection has never been observed. With these may be specially mentioned the conical projection in species of Rosellinia which has been recently examined by Crid', but is better understood and described by de Seynes ^ In dried specimens of Rosellinia Aquila the cone is a cylindrically ovoid body projecting from the apex into the interior of the ascus, longer than the breadth of the apex of the ascus which it almost but not quite fills, and traversed by a narrow longitudinal canal; in other words it is like a very thick annular ridge projecting from the inner surface of the wall of the apex : it is coloured dark blue with iodine, as has been often described. If the view expressed in the case of Cordyceps is correct, it is a ques- tion in the last-mentioned case also whether the thickenings at the apex are not reserve- pieces to assist in the ejection of the spores and destined to expansion. On the other hand, from Zopf's account of Sordaria Brefeldii (page 88) we might ask whether they possibly serve as means of fixing the spores in the apex of the ascus. All this requires investigation, in which each species must be separately ex- amined, since ejection is by no mea
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