. A handbook of cryptogamic botany. Cryptogams. SCHIZOM YCE TES 451 which have been termed Bacillus Cohn (long rods), and specially Bac- terium Cohn (short rods); the shortly coiled forms are known as Vibrio Cohn ; and the spiral forms have received the names of Spirillum Ehrenb., Spirochceta Ehrenb., &c., and the very elongated filiform forms are Leptothrix Ktz., Beggiatoa Trev. &c. Involution forms are swollen bladder-like structures of irregular outline probably produced by malnutrition. These growth-forms of cells or of individuals either occur free, or in the form of filaments, or
. A handbook of cryptogamic botany. Cryptogams. SCHIZOM YCE TES 451 which have been termed Bacillus Cohn (long rods), and specially Bac- terium Cohn (short rods); the shortly coiled forms are known as Vibrio Cohn ; and the spiral forms have received the names of Spirillum Ehrenb., Spirochceta Ehrenb., &c., and the very elongated filiform forms are Leptothrix Ktz., Beggiatoa Trev. &c. Involution forms are swollen bladder-like structures of irregular outline probably produced by malnutrition. These growth-forms of cells or of individuals either occur free, or in the form of filaments, or more seldom of flat surfaces or cube-like packets. Large gelatinous masses called Zpoglma, composed of numerous individuals of these growth-forms, occur in various situations such as the surfaces of fluids and solids, or they may be found suspended in fluids. c ^ cz> o o o «. Fig. 379.—Bctcillus Fitzianus Zopf. Transition forms from round cocci to rods d^ with spores ( X 4,000). (After Buchner.) Such forms of Bacteria are grouped into two divisions, viz. those which form their spores endogenously, the Endosporous Bacteria, and those which have no such mode of forming spores, the Arthrosporous Bacteria. This classification, which can hardly be regarded as finally satisfactory, corresponds, at all events, with the state of our knowledge of the course of development of Bacteria. Endosporous multiplication is accomplished by the formation within a cell of a minute, granule-like body, which gradually enlarges, while the surrounding protoplasm disappears until it reaches its mature form G G 2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bennett, Alfred W. (Alfred William), 1833-1902; Murray, George Robert Milne, 1858-. London, New York, Longmans, Green, and Co.
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