Notes on bacteroides melaninogenicus.

element is still in doubt. Efforts are being directed toward the interpretation of the structures which can be visualized in bacteria (DeLamater, Ann. Rev. Microbiol, 8, 23, 1954). The description and (lemonstration of the nuclear configurations found in normal vegetative cells of S. typhosa form the basis for comparison with cells treated with colchicine described by Minsavage and DeLamater (J. Bacteriol., accepted for publication).