Biological and Immunological Studies of Listerella.

Preliminary notes published from this laboratory in the past (Morris and Julianelle, 1935; Julianelle and Pons, 1939a, b; Pons and Julianelle, 1939; and Julianelle, 1940) have dealt summarily with different aspects of the biological and immunological characteristics of the genus Listerella. The data now available after several years of intermittent study bring this phase of the work to a stage of completion, and it is desirable, therefore, to consolidate the information acquired into a single communication containing in extenso both the observations preliminarily reported upon, and the results of certain experiments hitherto unpublished.