THE GENEKA OF MOSSES. 
79 
9. The columella and sporular sac removed from 
the theca ; the columella with its elongation, 
is shewn by dividing and throwing back the 
sporular sac. Precisely the same appearance 
occurs in Buxhaumia, 
10. A mature theca divided^ and exhibiting the spo- : 
rular sac connected with the sides of the theca 
by white-jointed filaments ; the columella with 
its elongation passing through the conical pe- 
ristome; and the whole supported by the 
small column, to the summit of which both 
the columella and sporular sac are most firmly 
attached. 
11. Sporules. 
12. A portion of the peristomium highly magnified. 
All the figures, except the first, more or less 
magnified. 
Gen, X. BuxBAUMiA, Mailer. 
Fruct. Calyptra conica vix acuminata, mitrseformis, 
integerrima, fugacissima, brevis, membranacea, Isevis, viridi- 
fuscescens. Seta terminalis, tres ad sex lineas longa, erecta, 
rigida, crassiuscula, cylindracea, tuberculata, nitidiuscula, 
ruberrima. Apophysis brevis, cylindracea, seta vix crassior, 
Isevis, thecse concolor, interne columna cylindrica saccum 
sporuliferum sustinenti medio in orbem inflata. Theca 
magna, ovata, obliqua, supra plana, submarginata, basi 
producta vel gibba, infra convexa," " parte superiore tene- 
ra, inferiore membranaceo-carnosa colore " viridis, rube- 
dine saepe tincta, maturitate rufo-fusca," oris margine ele- 
vate crenulato. Opercuhim obtuso-conicum, breve, rectum, 
