The third volume of this peerless reference contains the most recent updates on environmentally important bacteria, with current classifications of Gram-negative eubacteria and archeobacteria. Other topics covered include cyanobacteria as part of the prokaryotic organisms, extreme thermophiles and halophiles, gliding, budding, prosthecate and stalked bacteria, and more. The wide range of new subjects is thoroughly treated with morphology, physiology and metabolism updates