THE GENERA OF MOSSES. 
73 
with membranous borders to the mouth, than with Weis- 
sia, Dicranurriy and Trkhostomumy Dr HooRer pro- 
ceeds, however, to state, " I therefore think that our two 
genera might be brought near to Leptostomum of Brown, 
in consequence of their being furnished with a membranous 
peristome : and Buxha(iimia may claim to be separated not 
only from the double-fringed mosses, but from the gene- 
rality of the single-fringed ones, from the circumstance of 
the teeth, or cilia, not exhibiting any appearance of articu- 
lation, along with Dawsonia and Polytrichiim 
In much of these observations we readily concur, and 
have consequently assigned this place to the Buxbaumoi- 
de^; in respect, however, to thdr affinity with Lepto- 
stomum, we cannot but dissent from Dr Hooker, and con- 
sider that genus (as, indeed, has been already remarked by 
Mr Brown) far more nearly aUied to Bryum. 
Gen. IX. DiPHYSciuM. 
Fruct. Calyptra conico-acuminata, mitrseformis, fugax, 
theca multo brevior, operculp subsequalis, membranacea, 
fuscescens. Seta terminalis, perbrevis, laevis, thecse con- 
color. Theca dubie apophysata (interne columna cylin- 
dracea saccum sporuliferum sustinenti inferne insigniter 
dilatata), integra, Isevis, " ovata obliqua supra parum de- 
pressa, sed basin versus gibbosa, subtus ventricosa," viciae 
* The two plants forming this group have been so ably and so fully de- 
scribed by Dr Hooker in the New Series of the Flora Londinensis," that 
our readers will find almost nothing additional in this portion of our paper ; 
his descriptions are so accurate that we have frequently borrowed whole 
passages from that work, which we have marked by inverted commas. 
