sporoblasts ir each partition, .016-27 by .005-9 Reaction of the 
thekes with iodine yellowish, or vinous red. Paraphyses none. 
45 . CYRTinULA, Minks. 
“ Thallus endophlceoid, slightly indicated, the gonidetna chroole- 
pooid. Apoth. simple, solitary or heaped, disciform, but not rarely 
with a pyreniform habit, originally or at length free, or veiled by the 
substrate, without exciple, but covered with a lacunose, superior in¬ 
tegument, the cyrtidium, with an open fissure regularly or irregularly 
running round or through it. at once and suddenly evacuated. Hy- 
pothecium arising from the thallus, the sterigmas slightly or well 
marked. Paraphyses always connected with each other and with the 
hyphose network of the cyrtidium. Thekes polymorphous in the 
same apoth., arising from the sterigmas next the paraphyses. Spores 
simple, unilocular, with the original blastidium transversely 2-pleio- 
blastish, finally longitudinally divided .”—Revue Mycologique, April, 
1S91. 
The plants of which this Genus is composed are very minute and 
inconspicuous, resembling small Arthonias or Pyrenulas, growing, 
as I have found them, on small branches of various trees, but also in 
Europe, parasitic. Dr. Minks has described, in the work cited, to 
which I must refer the reader, several species sent him by me, and 
has more recently named others yet to be described. The Genus is 
so obscure and difficult that I have not attempted any elaborate study 
of it, and can only give the names of the species. 
1. C. fuscoriibella. Minks, l. c., p. 3. On small branches of red 
maple, 18S1. Spores oblong, 2-3 locular, .0x3 by .005 mm. 
C. limbata, Minks, p. 3. On young twigs of sassafras, 1881. 
Spores suboblong or cuneate, bilocular, .013 by .006 mm. 
3. C. Idaeica, Minks, p. 5. On branches of elder, 1870. Also in 
Europe. Spores narrowly cuneate or rarely oblong, hardly bilocular, 
.0x0 by .006 mm. 
4. C. Illicrospora, Minks, p. 8. On clethra alnifolia , Ilex verti- 
cillata , and perhaps also on oaks. Spores oblong, bilocular, .010 by 
.003 mm. Also in Texas. 
v C. Americana, Minks in lift. On holly, 1885, and other trees. 
Spores oblong, 4-locular, .015-18 by .005-7 mm. Spermatia very 
minute. 
6. C. macillaris, Minks in lift. On witch hazel, holly, and other 
trees. Spores oblong-ovoid, rarely colored, 3-locular, .018-27 by 
.007-10 mm. Also in Florida. 
