296 ON A NEW CANICER-DISEASE OF PRUNUS YEDOENSIS, etc. 
Further we were fully convinced that these two fungi are quite different, 
when we examined and compared our fungus with the European specimen of 
Valsa ambiens preserved in the Herbarium of our University. 
As we have not been able to find any species of Valsa or Cytospora which 
agrees exactly with the present fungus, either in mycological or phytopa- 
thological literature, we consider the fungus in question to be quite new to 
science. The species may be characterized as follows : — 
Valsa japonica Mivabe et Hemmi sp. 11. 
Stromata scattered, produced at first under periderm, then erumpent, 
forming lenticel-like openings, which are slightly elongated horizontally, 
conical or wart-like with round or elliptical bases, gray or brownish-gray 
with many black ostioles of perithecia on the surface, gray or yellowish gray, 
subcoriaceous in the inside, consisting for the most part of the mycelial tissue, 
with a few host cells scattered deeply in it, about 3-5 mm. in average breadth, 
2-4111111. in average height and 1-1.5111111. in depth; perithecia immersed, 
subglobose with long neck, compactly arranged in concentric circles, 1 5-40 
in a stroma, 350-580« in diameter ; asci cylindrical or rarely clavate, subsessile 
or short stalked, 60-96x8.8-16.0/*, hyaline, eight-spored, evanescent in old 
perithecia ; spores mostly biseriate, sometimes irregularly arranged, allantoid 
with rounded ends, almost hyaline, slightly curved, 10.O-28.0 x 3.2-7.2/i (com- 
monly 1 8.0-22.0 x 4.0-4.8 p). 
lYcnidia: stromata scattered, produced at first under periderm as sub- 
spherical or ellipsoidal cushions, then erumpent, turning to conical or wart- 
like shape, average about 2.2 mm. in breadth, 1.5 mm. in height and 1.0 mm. 
in depth ; internally divided into cavities with a single common exit ; pycno- 
spores hyaline, cylindrical, rounded at both ends, generally curved but occa- 
sionally straight, 3.50-15.75 x 1.00-2,63 ft (most commonly 7.00-8.75 x 1.4- 
1.75 ft), oozing out in reddish curls when moist; basidia hyaline, simple or 
branched, variable in length but measuring 14-28 x 1. 75-2.1 ft. 
Hab. On the bark of Prunns yedoensis Matsum. 
