Small, smooth, raised, entire, pearly colonies on meat infusion agar; medium dis- colored; litmus milk alkaline in 1 to 2 days; cause bronchopneumonia in rodents and sometimes associated with canine distemper Bordetella p. 402 Not as above 127 127. Agar digested 128 Agar not digested 129 128. Alginates are metabolized; flagella polar Alginomonas p. 202 (See also Pseudomonas gelatica.) Alginate metabolism not recorded; flagella peritrichous .... Agarbacterium p. 322 129. Obligate halophiles, requiring 20 to 30 per cent salt for growth Halobacteriinn p. 207 Not as above 130 130. Alginates metabolized; flagella polar Alginomonas p. 202 Not as above 131 131. Organisms found growing in water among decomposing plant tissue; produce a charac- teristic lobed gelatinous zoogloea in which the cells are well isolated from each other; produce cartilaginous colonies on agar Zoogloea p. 206 Cells actively motile, by means of polar flagella; deposit sulfur internally when grow- ing in the presence of hydrogen sulfide Thiospira p. 82 Note: It is doubtful whether this genus should appear under aerobic organisms. Not as above 132 132. Flagella polar 133 Flagella peritrichous 135 133. Organisms will grow in a mineral salts medium using CO2 as the sole source of car- bon and will oxidize hydrogen Hydrogenomonas p. 75 Rods 0.5 by 1 to 2 microns; gelatin liquefied; nitrites and gas produced from nitrates; starch hydrolj^zed; lipolytic; will grow autotrophically, oxidizing thiosulfate to sulfate and tetrathionate with an increase in pH. Sulfur is not precipitated Thiobacillus p. 83 Not as above 134 134. Organisms cause disintegration of filter paper when growing in 0.5 per cent peptone water Cellulonionas p. 601 (See also Pseudomonas mira.) Not as above Pseudomonas p. 89 (See also Agrobacterium stellulatum, A. radiobacter, Xanihomonas panici, X. rnbri- subalbicans, X. cannae, X. zingiberi and Rhizobhun japonicum.) 135. Litmus milk alkaline Alcaligenes p. 297 (See also Agrobacterium radiobacter and RJiizobium spp.) Litmus milk acid or unchanged Achromobacter p. 300
