Tanaka: New Japanese Fungi 



367 



spores with smaller terminal cells ; M. Antoniae Far., which is 

 related to our M. phorcioides by its ascospores having a large 

 number of cells, can be distinguished by 6- (rarely 7-8) celled 

 spores, instead of 4- (rarely 6-7) celled as in the latter species. 

 Massaria olivaceo-hirta Cooke is rather doubtful but may differ 

 in the color and form of ascospores. 



Mycosphaerella Horii K. Hara sp. nov. in Nippon Engei 



Zasshi (Journ. of Hort. Soc. Japan), 29 s : 10, illus. (p. 9, 



figs. 1-6). T. 6, iii, Mar. 1917. (Japanese.) 



Spots irregularly orbicular, about 3-6 mm. across, reddish- 

 brown and frequently changing to gray when mature ; margin 

 definite, raised, blackish-brown, punctated with black, minute 

 perithecia ; perithecia gregarious or scattered, punctiform, at first 

 immersed then partly erumpent, black, globose or elliptico-globose, 

 60-100 fx; perithecial walls pseudo-parenchymatous, cells rather 

 indefinite, about 3-8 \x across, blackish-brown, carbonaceous ; 

 ostiola slightly raised, warty or short papillate with openings 

 about 5-7 fx across ; asci caespitose, clavate-cylindrical or oblong- 

 ovoid, obtuse, stipitate, octosporous, 30-40 X 7-10 fx ; ascospores 

 biseriate or inordinate, oblong-ovoid, uniseptate, not usually con- 

 stricted; terminal cell slightly wider and much rounded at the 

 apex; basal cell rather acuminate toward the base though not 

 pointed at the end and nearly as round as the apex, colorless and 

 hyaline, 9-12.5 X 2.5-3 



On leaves of Citrus. 



Type locality : Hamana-mura, Inasa-gun, Shidzuoka-ken, Japan, 

 June, 1914, Kataro, Shimidzu. 



Japanese name of disease: Kasshoku Ko-maruboshibyo (small, 

 brown, round-spot disease). 



Illustrations : 6 text figures showing detailed structure of the 

 fungus. 



Dr. Shotaro Hori, in Engei no Tomo (Friend of Horticulture) 

 9 7 : 40-45, Tokyo, July, 1913, considers the cause of this disease 

 to be Phyllosticta curvarispora Hori sp. nov. As no description 

 of the fungus was given there or elsewhere, there is no way to 

 determine whether this imperfect fungus is a form of Myco- 

 sphaerella Horii, but the existence of such relationship is suggested 

 as very possible since many species of these two genera are known 

 to be related. The fungus mostly attacks navel and Unshu (Sat- 

 suma) oranges, according to Dr. Hori. 



