NOTES AND MEMORANDA. 



177 



A. 0, A fully mature spinulose resting-spore, containing a large oil-drop ; f, 

 the empty female cell, the haustoria, h, h, h, h, represented as cut off; m, 

 the empty male cell. 



B. Two individuals of different sexes coupled for the fertilisation of the 

 resting-spore^ their protoplasm about to become combined, as can be 

 readily perceived by its contraction under glycerine j f, the female, m, the 

 male individual, each with its haustoria {h, h) having penetrated the 

 Euglense (e, e) ; o, the oospore, originating as the result of the fertilisation, 

 already surrounded by a thick wall. 



C. A young Polyphagus with a short thick haustorium (e), having penetrated 

 into a dead Euglena, the remaining haustoria are thin and filamentary, and 

 have also penetrated into Euglense. 



D. Two germinating zoospores of Polyphagus, each with its strongly re- 

 fractive nucleus and five radiating germ-threads (haustoria), of which two 

 already somewhat thicker have penetrated into the neighbouring Euglenje 

 {e, e). 



E. Zoospores making their exit through the terminal opening of the zoospo- 

 rangium j p, prosporangium, h^ h, haustoria (represented as cut off). 



