ON ACTINOCOCCUS AND PHYLLOPHOBA. 



169 



September, 1898, when the author left Kiel. The development of the 

 plant in question was followed out, and as a result the author has 

 accepted Schmitz' view of the parasitic nature of Actinococcus, the 

 correctness of which view, however, Schmitz unfortunately was not 

 able to establish, as he did not succeed in observing the entrance of the 

 parasite into the host. 



The following is an account of the anatomy and development of 

 Actinococcus subcutaneus (Lyngb.) K. Rosenv., which forms the 'pseudo- 

 nemathecium' of Phyll, Brodiaei (Turn.) J. Ag. 



Actinococcus subcutaneus (Lyngb.) K. Rosenv. 



Almost at every time of the year small, more or less spherical, dark 

 reddish bodies are found on the flat expansions forming the thallus of 



Fig. 3. Phyllophora Brodiaei (Turn.) J. Ag, 

 Sterile, Baltic forms. Nat. size. 



Phyll. Brodiaei. They are sessile on the young shoots at the apex of 



