Feb., !9i5.] s. JTO.—ON TYPHULOCHAETA, A NEW GENUS. 19 



The asci are ovate, oblong-ovate or ellipsoidal in shape, 

 with short stalk at the base, measuring 70-97 by 40-55 fi. 

 The wall of the ascus is very thin at the apex (Fig. 12). Their 

 number in a peritheciuni are 5-13. Generally, we count the 

 number of asci by rupturing the perithecial wall by giving a 

 light pressure over the cover glass (Fig. 13). Besides this 

 method, I suecessed to count them by the apical view of the 

 intact perithecium, whose color turns from chestnut-brown or 

 brownish black to yellowish brown and at the same time it 

 becomes semitransparent by boiling it in a concentrated solu- 

 tion of potassium hydroxide (Fig. 14). 



The ascospores are colorless or light yellowish, granular, 

 non-septate, oblong or ellipsoidal in shape 18-36x12-18 fx in 

 size, and normally 8, rarely 6 in an ascus (Fig. 15). 



The Oidium stage is not yet observed. 



The appendages of this fungus somewhat resemble to the 

 stalk of the penicillate cells which spring from the perithecium 

 of Phyllactinia corylea, in the position of their formation, in 

 the process of the mucilaginous degeneration and in the presence 

 of the protoplasmic thread; but the penicillate outgrowths have 

 never been observed in our species. Salmon (6. 7. 9) gave a 

 full account of the structure of the outgrowth. I have here 

 reproduced Salmon's figure (9) of this penicillate cell of 

 Phyllactinia on Quercus, for the sake of comparison with our 

 appendages (Fig. 16). Moreover, it must be noted that the 

 perithecia of our fungus do not turn over when they are fully 

 matured. 



In order to solve the question, whether our fungus is an 

 immature stage of a species of some already well recognized 

 genus of Erysiphaceae or not, I asked Mr. K. Hara to collect 

 well ripened specimens late in autumn. He sent me excellent 

 specimens on the dead fallen leaves of Quercus glandulifera. 

 Also in this case, all appendages of the fully matured perithecia 

 are invariably clavate in shape. 



From these consideration, we think our fungus is new to 

 science. The diagnosis of this fungus, for which I propose the 

 name Typhulochaeta Japonica S. Pro et Hara, is as follows :— 



