164 
— 6 60), which seems to his own showin ree Pp: 2a) 
on Birch and, as he ey states, is identical with M. Batis 
linum, Schmidt et Kun Saceardo wrongly — this to 
Dichomera Saubinetii. M. a Corda, therefore entirely 
disappears. 
The same may be said of Didymosporium profusum, Fr. Syst. 
Mye. iii. 487 = Stilbospora profusa, Grev. Scot. Crypt. Fl. tab. 
212, f. 1 (1826). Original specimens in Herb. Kew, with the name 
written in Greville’s own hand, are on Birch and are identical with 
M. bicolor, Nees, t ongh he certainly included u he nam 
several of the other s s he supposed reidentification by 
the writer of Grevyille’s ae in Journ. Bot. 1886, p. 197, turns 
out to be an error; at that time the 
examining Greville’s specimens, and his figure is decidedly mis- 
leading. The peculiar shape and position of the single guttule 
gives under a low power, in spores taken from the original speci- 
mens mentioned above, a very deceptive simulation of a median 
septum he same e misconception no doubt accounts for some of 
the sith species placed under Didymosporium. 
3. ——— rae a §& Ev. in Peck, 44th Rep. New 
York State Mus., 1890 
This fungus, eo on ee virginica from Towa, U.S.A 
is Sunes Es in Herb. Kew by a specimen issued by Ellis, North 
> 
n Fungi no. 961! named ‘“ M. bicolor,’’ a name shoe - 
was ventiners ctitrocteid by the authors theniselve s, who 
the true M. bicolor in Sue = , no. 2390, and tien tend: ne 
name of no. to M. zonatum. 
Hit 
therto this species has eee been considered British, but there 
isa specimen in Herb. Berk. no. 1574 erpertatls British, ae 
no locality is given) on Birch, misnamed ‘ “on 
spores of this er from M. bespkor exact] bie 
assigned to M. zonatum, and it is no doubt “Soe oo Ostrya 
and Betula are Sine allied gener: 
The following is the description : the British specimen : — 
Pustules scattered, black, round, about 1 m 
x 
middle by a . semipellucid zone which in ees is seen to be 
caused by a large vacuolar space (not oil guttule 
: ) hark of Birch (Herb. Berk. no. 1574!), ade with Libertella 
etu 
The e-specimen on Ostrya differs only in having more dis- 
tinctly ae or subeylindrical spores, measuring 13-15 x 6-7 p35 
the spores have the same dusky colour, whic ic different 
from that of 1. erties and the same median zone, due to the 
same cause. The whitish stroma is not really wanting, as Ellis 
