. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. 4^4 SECOND PART.—MYCETOZOA. Delay may of course occur where the conditions are unfavourable. That the several species behave very differently in these respects is shown by the fact, that many of them, Trichia rubiformis, T. clavata and T. varia for example, are observed to form their sporangia almost entirely during a short portion of the yearly period of vegetation. The biological relations of most of the species require further examination. Section CXXII. The structure of t
. Comparative morphology and biology of the fungi, mycetozoa and bacteria. Fungi -- Morphology; Bacteria -- Morphology. 4^4 SECOND PART.—MYCETOZOA. Delay may of course occur where the conditions are unfavourable. That the several species behave very differently in these respects is shown by the fact, that many of them, Trichia rubiformis, T. clavata and T. varia for example, are observed to form their sporangia almost entirely during a short portion of the yearly period of vegetation. The biological relations of most of the species require further examination. Section CXXII. The structure of the mature sporophores is n all cases essentially the same as in the Ceratieae. The ripe sporangia in the majority of the endosporous genera, which show a great amount of variation in different species, must be described from a few of the typical forms, which have been known for some time. For special peculiarities the reader is referred to monographs and especially to that of Rostafinski. We must first distinguish between the simple sporangium, which proceeds from one Plasmodium or from a part of one plasmodium, and the ael/ialium, as Rostafinski understands that term, which is formed from large comdinalions of Plasmodia. i. It has been already said that the mature sporangia in most Myxomycetes are round or elongated, stalked or sessile vesicles one to a few millimeters high ; less frequently, as in Didymium serpula, Trichia serpula and Licea fiexuosa, P., they are cylindrical or flattened tubes forming a network and lying on the substratum. The wall of the sporangium is formed of a membrane which in constitution re- sembles the cellulose-membranes of plants. It is either a structureless hyaline and FIG. 189. Didymium squamulosjtm, [D. , t t uucopus, Fr.) a ripe sporangium divided longitudinally sometimes, as in Diachea and some specie-* near the middle with the spores removed. Magn. about Climes. ofPhysarum, an extremely delicate mem- brane, or it is thick ami firm and
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