Page:Bergey's manual of determinative bacteriology.djvu/911

 Source : Isolated from goat dung and from soil from Ames, Iowa. Habitat: Soil. Decomposes organic mat- ter, especially bacterial cells in dung. Illustrations: Beebe {ibid., PI. II, Figs. 5 and 6; PI. IV, Fig. 18). 6. Chondrococcus cerebriforniis (Ko- fler, 1913) Jahn, 1924. (Myxococcus cerebri- forniis Kofler, Sitzber. d. kais. Wiss. Wien, math.-nat. Klasse, Abt. I, 122, 1913, 866; Jahn, Beitriige zur bot. Protistologie. I, Die Polyangiden. Geb. Borntraeger, Leip- zig, 1924, 86.) ce.reb.ri.for'mis. L. noun cerebrum brain; L. noun/or?«« shape; M.L. adj. cerebri forijus brain-like. Vegetative cells: Rods 4 to 12 microns. Fruiting bodies: About 1 mm long, clumped masses with swollen upper surface, brain-like, violet-rose, often lead-gray. Microcysts 1.1 to 1.6 microns. Jahn (loc. cit.) suggests that this may be Archangium gephyra. Source: Isolated from hare dung in the vicinity of Vienna. Habitat: Found in the dung of various animals. Illustrations: Kofler (op. cit., 1913, PI. 2, Figs. 7 and 8). 7. Chondrococcus coluinnaris (Davis, 1923) Ordal and Rucker, 1944. (Bacillus columnnris Davis, Bull. U. S. Bur. Fisheries, 38, 1923, 261; Ordal and Rucker, Proc. Soc. Exper. Biol, and Med., 56, 1944, 18; also see Fish and Rucker, Trans. Amer. Fish. Soc, 73rd Annual Vol. for 1943, 1945, 32.) co.lum.na'ris. L. adj. columnaris rising like a pillar. Vegetative cells: Flexible, weakly refrac- tive. Gram-negative rods, 0.5 to 0.7 by 4.0 to 8.0 microns. Creeping motion observed on solid media, and flexing movements ob- served in liquid media. Microcysts: 0.7 to 1.2 microns, spherical to ellipsoidal. Fruiting bodies: A peculiar type of fruit- ing body is formed in liquid media. Where organisms are in contact with infected tis- sues or with scales, columnar and some- times branched fruiting bodies are produced in which t_ypical microcysts develop in 7 to 10 days. Physiology: Growth best on 0.5 to 0.9 per cent agar with 0.25 to 0.50 per cent Bac- totryptone at pH 7.3. Colonies on tryptone agar are yellow, flat and irregular; edge uneven with swarming apparent. Gelatin liquefied rapidly. Indole not produced. Ni- trites not produced from nitrates. Starch, cellulose and agar not attacked. Sugars not fermented, but glucose is oxidized. Source: First described as the cause of a bacterial disease of warm-water fishes (Da- vis, op. cit., 1923, 261), and later in finger- lings of the cold-water blue-black salmon (Oncorrhynchus nerka). Transmissible to salmonid fishes. Genus III. Angiococcus Jahn, 1924- (Beitrage zur bot. Protistologie. I, Die Polyangiden. Geb. Borntraeger, Leipzig, 1924, 89.) An.gi.o.coc'cus. Gr. noun angium vessel; Gr. noun coccus a berry; M.L. mas.n. Angio- coccus vessel coccus. Fruiting body consists of numerous, round (disc-shaped) cysts; cyst wall thin, micro- cysts within. The type species is Angiococcus disciformis (Thaxter) Jahn. Key to the species of genus Angiococcus. I. Cysts yellow to dark orange-yellow^; disc-shaped; 35 microns in diameter. 1. Angiococcus disciformis. II. C3sts colorless to yellow; round; u]) to 15 microns in diameter. 2. Angiococcus cellulosum. 1. Angiococcus jHsciformis (Thaxter, Thaxter, Bot. Gaz., 87, 1904, 412; Jahn, 1904) Jahn, 1924. (Myxococcus disciformis Beitrage zur bot. Protistologie. I, Die Poly-