. Comparative morphology of Fungi. Fungi. 118 COMPARATIVE MORPHOLOGY OF FUNGI 1897; Lowenthal, 1903; Woycicki, 1904, 1907, 1927; Olive, 1907; Lakon, 1926; and Levisohn, 1927), and B. myxophilus on bacterial zoogloea on fallen pine needles (R. E. Fries, 1899). The mycelium of B. ranarum develops abundantly on the excrement of frogs in 2 to 3 days. It consists of ramose hyphae whose cells when young are uninucleate and sometimes, in age or poor nourishment, multi- nucleate. The hyphae are persistent in the excrement, but in artificial culture may break up into oidia, resembling the hyphal bodies
. Comparative morphology of Fungi. Fungi. 118 COMPARATIVE MORPHOLOGY OF FUNGI 1897; Lowenthal, 1903; Woycicki, 1904, 1907, 1927; Olive, 1907; Lakon, 1926; and Levisohn, 1927), and B. myxophilus on bacterial zoogloea on fallen pine needles (R. E. Fries, 1899). The mycelium of B. ranarum develops abundantly on the excrement of frogs in 2 to 3 days. It consists of ramose hyphae whose cells when young are uninucleate and sometimes, in age or poor nourishment, multi- nucleate. The hyphae are persistent in the excrement, but in artificial culture may break up into oidia, resembling the hyphal bodies of the Entomophthoraae. After a short time, asexual reproduction begins. Each cell grows into a thin, upright sporangiophore, which projects above the medium, swells clavately at its end and absorbs the nucleus and considerable cytoplasm. Fig. 70.—Basidiobolus ranarum. 1. Young mycelium with conidiophores. 2. Conid- ium germinating as conidiophore. 3. Conidium. 4. Conidium which has divided once, each half germinating with germ tubes. 5 to 8. Development of conidium and its appara- tus of discharge. (1 X 40; 2 X 140; 3, 4 X 375; 5 to 8 X 335; after Eidam, 1887.) from the cell (Fig. 70, 5 to 8). The swelling is abjointed as a sporangium. Although only a thin protoplasmic peripheral layer remains in the sporangiophore, the absorption of water from the mycelium continues uninterruptedly. When the increasing turgidity exceeds the elasticity of the membrane, the sporangiophore splits, and its dome, together with the sporangium, flies off a few centimeters. While still in the air, the portion of the sporangiophore usually falls off the sporangium. The discharged sporangium is pyriform and papillate below (Fig. 70, 3). On the papilla there is a small hyaline peg with triangular base and a small tip with a fine point where the sporangium separated from the sporangiophore. The sporangia are eaten by beetles, principally Carabidae, Scarabaei- dae and Silphidae which prowl about the ex
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