ing to my own measurement the matured spores are 56-72 x i 5-20 /^e in size, and 

 at each septum they are more or less constricted. From the terminal light colored 

 cell, three or four and sometimes more wart-like swellings appear in the early 

 stage of their development ; and the swellings grow little by little into the threads 

 or hairs resembling to the setae of Pestalozzia-'s^oxft'-,. One of these hairs is 

 always first produced from the tip of the uppermost cell and the others then suc- 

 ceeding from the side more often near the septum of the same cell. They are at 

 last very long, becoming often longer than the length of the spore, and always 

 hyaline. These hairs or setae are sometimes branched near the base and as a con- 

 sequence they present an appearance of the presence of many hairs. The setae 

 are 2.5-3// in width at the basal portion. 



The morphological characters above delineated are entirely similar to the descriptions and remarks 

 of Ceratophorum setosum and Pestalozzia Lupini given by various authors. The latter name ought to Ijc 

 treated as a synonym of the former. Althou;;h the measurement and the number of the cells of ihe spores 

 are more or less different according to the authors as shown in the followin.g table, such a s:nall ditfereace 

 has little value in distinguishing the species, when other important characters are iu perfect accord. 



The spores germinate usually first from the basal cell, though they may also germinate from an upper 

 dark colored cell— the next cell from the setae-bearing terminal cell, or from both of them at tlie same time. 

 Any other cells have also the power to germinate under suitable conditions. Tliese germ-tubes are rela- 

 tively wide in diameter, branching at once and forming transparent septate mycelium. For germination 

 tests, distilled water and host-plant decoction were used in our experiments. 



5. Name of the Causal Fungus 



From the morphological characters, we may easily recognize the present fun- 

 gus to be a member of the family Deinatiaceae of the Hyphomyeetes. A careful 

 consideration of the fungus, both in the natural condition and in the artificial 

 culture, has led tlie writer to believe it to be Ceratophorum setosum Kirchner, as 

 already stated. The genus Ceratophorum was first described by SaccakdoOj) in 

 1880; and in 1S95 he founded \.\\c suhgcvwis Plciochaeta in his Sylloge Fungorum, 



