DIPHTHERITIC ROUP. 5 



shining, globular bodies, forming small granular 

 excrescences. Fresh spores are here continually 

 being developed, and thus spreading the growth. In 

 these growths I have nearly always been able to dis- 

 cover numbers of psendo-navicellae (fig. 1, b), which 

 are undoubtedly the spores of one of the Sporozoa. and 

 which I found likewise gave rise to amoebuipe such as 

 Rivolta described (fig. l,a). On inoculating five Fowl- 

 Fig. 1. 



Pseudo-navieellae and Amcebulae. 



with these germs, the usual diphtheritic symptoms 

 made their appearance in about ten days. These spore- 

 eases, full of psendo-navicellae and scattered spores, 

 were generally found in the deepest parts of the 

 growths together with numbers of amcebuhe. In 

 several birds I examined, however, which were in 

 an advanced cachectic condition, and which had these 

 diphtheritic masses of immense size and comparatively 

 loose, one might almost describe them as ' ripe,' no 

 traces whatever could be found in the purulent ma*s 

 of granular matter. Probably the disease had worked 

 itself out. 



