. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. lgS DIVISION II.—COURSE OF DEVELOPMENT OF FUNGI. transverse diameter of the mycelial hypha 10 times or more (&). Then they cease to lengthen, are delimited from their parent-hyphae and conjugate at their summits, the cell-walls disappearing at the point of contact and the two protoplasmic bodies coalescing into one (c). The place of conjugation then swills into a spherical vesicle, which is delimited when tin- protoplasm of the pair of cells has passed into it, and having
. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. lgS DIVISION II.—COURSE OF DEVELOPMENT OF FUNGI. transverse diameter of the mycelial hypha 10 times or more (&). Then they cease to lengthen, are delimited from their parent-hyphae and conjugate at their summits, the cell-walls disappearing at the point of contact and the two protoplasmic bodies coalescing into one (c). The place of conjugation then swills into a spherical vesicle, which is delimited when tin- protoplasm of the pair of cells has passed into it, and having thus become an ascus forms 8 spores capable of germination (//-_/"). The spores are formed, as far as can be gathered from Eidam's somewhat superficial description, in the manner described in section XIX. No further complications have been observed in the formation of these sporocarps. 2. Distinct archicarps are formed as branches on the mycelium or on vegetating hyphae in the thallus singly, or rarely in groups, as in Pyronema and Physma. It depends on the species whether the archicarp is a single cell or, as is more com- monly the case, a cell-row, and whether it is spirally coiled or of some other shape. The whole ascus-apparatus of the sporocarp is derived exclusively from the archi- carp. In Podosphaera a single ascus borne on a short stalk-cell is formed by transverse division of the uni- cellular archicarp; in other species ascogenous hyphae sprout as branches from the archicarp, or the cells of the archicarp divide into ascogenous daughter-cells, that is, into daughter-cells which sprout out into asci. The archi- carp takes no part in the forma- tion of the envelope-apparatus, that is, of the wall, receptaculum, excipulum, paraphyses, &c. This has its origin in the hyphal. 1 92. Ertmascus albus. a inception of the sporocarp. b—f further development in the succession of the letters. In / matured and the spores formed in it. After Eidam. Magn. 900 times. bra
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