252 



Mycologia 



Perithecia scattered over the twigs forming black spots, the 

 diseased cortex of the twig being very easily separated from the 

 wood. Perithecia hypoepidermal, opening with ostiola, consist- 

 ing of pseudo-parenchymatous tissue, black, spherical or ellipsoid, 

 250-300 in diameter and 200-250^ in height, containing few 

 asci ; asci clavate to elliptic, 1 10-140 X 3 5-42 /x, short stipitate, 

 with 8 biseriate spores, paraphysate ; ascospores fusiform, dark- 

 yellowish-brown, 1 -septate and 3-5 nucleate at first, then 4, rarely 

 3-5 septate, constricted only at the middle septum first formed, 

 45-52 X 19-22/*, covered with a gelatinous envelope; paraphyses 

 filiform, stout, with granular contents. 



On twigs of Morus alba, possibly parasitic (common). 



Type localities: Gifu-ken (prefecture) Kaidzu-gun Kaisai- 

 mura, Mar. 1909, I. Miyake; Fnkui-ken (prefecture) Tsuruga, 

 Mar. 1909, K. Hara ; Fukushima-ken (prefecture) Fukushima- 

 shi and Yamagata-ken (pref.): Yamagata-shi, Mar. 191 5, I. 

 Miyake; Akita-ken (pref.) Akita-shi, and Otate-cho, Iwate-ken 

 (pref.) Fukuoka-cho, and Kyoto-fu (pref.) Ayabe-cho, Apr., 

 1915, I. Miyake. 



Distribution : China, Japan. 



Illustrations : 2 black and white lithographic figures showing 

 perithecium and ascospores. 



At the side close to the perithecia, a conidial form usually occurs 

 which consists of rosy-colored, caespitose conidiophores and 

 spherical or short elliptical hyaline conidia. The relation between 

 this form and the ascogenous form here described has not yet 

 been studied. The characteristic perithecial position of this 

 fungus can be seen with the naked eye if we examine carefully 

 the blackened discoidal surface of the diseased spot on which a 

 highly darkened spot at the central part is to be observed which 

 represents the perithecial body underlying the epidermal tissue. 



Massaria Mori, I. Miyake sp. nov. in Sangyo Shikenjo Hokoku 

 (Technical Report, Imperial Sericultural Experiment Station), 

 Tokyo, Japan, i 5 : 319, pi. 17, figs. 12, 13, 14. T. 5, xii, Dec. 

 1916. (Japanese.) 



Perithecia covered by epidermis which is pierced by shortly 

 projecting ostiola, scattered or 2-3 together, mostly surrounded 

 by black hyphal substance pseudo-parenchymatous in appearance, 

 globoid or ellipsoid, 400-600 fi in diam. ; perithecial walls consist- 



