( 44^ ) 
XXVI. — Tentamen Method! Muscouum; 
OE, 
A New Arrangement of the Genera of Mosses, 
with Characters, and Observations on their 
Distribution^ History, and Structure, 
By R. K. Greville, LL.D. F. R. S. E. M. W. S. &a, 
AND 
A. Walker Arnott, Esq. A, M. F. R. S. E. 
(Continued from p. 89.) 
{Read 9.^d January 1825.) 
Memoir III. 
Splachnoide^, Gen. (11-— 13.) 
Char. Calyptra mitraeformis, basi thecam arete cingens, 
mox dimidiata, laevis, glabra, tenerrima, fugax, basi In- 
tegra. Seta terminalis. Theca apophysata. Operculum 
obtusum. Peristomium simplex ; dentes varie geminan- 
tes. Columella apice dilatato-globosa. 
Char. Calyptra mitriform, closely embracing the theca, at 
length dimidiate, even in surface, smooth, thin, evanes- 
cent, entire at the base. Seta terminal. Theca with an 
apophysis. Operculum obtuse. Peristome simple ; the 
teeth variously geminating. Columella capitate. 
