DEMONSTRATION OF TYPE SPECIFIC PROTEINS IN EXTRACTS OF FUSOBACTERIA.

1. The classification of fusobacteria into types, as suggested by Slanetz and Rettger on the basis of their cultural and biochemical characteristics, was confirmed. The following additional data are presented: the behavior of types I, II, and III in several previously untested carbohydrates; the final pH in 1 per cent glucose broth; the hydrolysis of starch; the failure to decompose sodium hippurate and citrates; the absence of pathogenicity for several types of experimental animals; and the absence of fibrinolysin and of proteolytic enzymes.