It has been shown in a previous paper that dogs survive intraperitoneal injections of colon bacilli suspended in saline, but that they succumb to intraperitoneal injections of colon bacilli suspended in gum tragacanth. This study concerns itself with the fate of the bacteria after their intraperitoneal injection in the two suspensions mentioned. Since the original investigations of von Recklinghausen,1 1863, much work has been done on the absorption from the peritoneal cavity of dyes (both diffusible and colloidal), organic and inorganic substances in solution and suspension, and colloids, including bacteria. The literature on the subject has been covered by Bolton,2 1921, Katsura3 and Notkin.4 The results of the various investigators have been conflicting in regard to the mode of absorption of the various substances. In the investigation of absorption by way of the lymphatics, the thoracic duct had been the only channel considered until the work of Bolton, 1921, and