Xii LIST OF ILLUSTRATIONS. 



FIG PAGE 



235. Culture of Bacillus liquefacieus magnus 692 



236. Culture of Bacillus radiatus, 692 



237. Culture of Bacillus spinosus, 692 



238. Culture of Bacillus liquefaciens parvus, 692 



239. Culture of Clostridium fcetidum, . 4 . . . . . . . 692 



240. Colony of Bacillus spiuosus 693 



241. " Spirochoete dentium," . 694 



242. " Spirochaete plicatilis, vibrio rugula, and other bacteria," . . . 694 



243. " Spirillum dentium," 694 



244. Vibrio rugula, 695 



245. Spirillum volutans, . . ' . . . . . . . . . 696 



246. Spirillum sanguineum, . . . . , . . . . . 696 



247. Spirillum serpens, 696 



248. Spirillum tenue, . 696 



249. Spirillum undula, . . ..... . . . . . 696 



250. Spirillum linguae, . j ... 697 



251. Spirillum a of Weibel, . . . 698 



252. Spirillum ft of Weibel, .'.... 698 



253. Spirillum y of Weibel, . . . . ., .... 699 



254. Spirillum aureum, 699 



255. Crenothrix Kuhniana, . . - . . 704 



256. Beggiatoa alba, 704 



257. Cladothrix dichotoma 707 



258. Nitrifying bacillus of Winogradsky, 710 



259. Bacillus thalassophilus, . . . . . . . . . 712 



260. Bacillus granulosus, . . . . . . . . . . 712 



261. Bacillus limosus, 713 



262. Spirillum marinum, , . 713 



263. Bacillus litoralis, 715 



264. Bacillus balophilus, 715 



265. Bacillus of Dantec, 718 



266. Bacillus Havaniensis 718 



267. Bacillus gracilis cadaveris, 733 



268. Colonies of Bacillus gracilis cadaveris, 73C 



