NEW BRITISH MOSSES. 183 
* Dennant, near Castle Conway ; June, 1844 ;" Mr. Wilson. 
“Todmorden ;^ Mr. Nowell; * Teesdale ;? Mr. Ibbotson. 
It is very probable that this species has often been passed - 
over for Mn. hornum or serratum (Bryum marginatum, Dicks), 
between which it is intermediate in size and appearance. It 
may, however, be distinguished from these, and from every 
other known species, by the leaves being distinctly serrated 
and at the same time destitute of thickened margins. During 
the process of drying it often assumes a bluish tinge, which 
in old specimens passed off into yellowish-brown. On slender 
innovations the leaves are bifariously arranged. 
11. Orthotrichum coarctatum, Pal. Beauv., “ monoicum, pul- 
vinatum ; caule erecto vel basi decumbente, ramoso, foliis 
patulis, siccitate crispatis, lineari-lanceolatis, costato-cari- 
natis, margine subplanis; capsula alte exserta, ovali-oblonga, 
8 striata, siccitate ore coarctata 8 costata ; calyptra conico- 
campanulata, pilosissima, margine laciniata ; ciliis raris- 
sime 16." Bryol. Eur. 
* O. coarctatum, Pal. Beauv. prodr. p. 80. Schwaegr. 
Suppl. I, P. 2, p. 26, T. 52; Brid. Bryol. univ. I, p. 288; 
Hook. et Grev. Journ. of Sc. 1824, p. 125; Ulota Bruchii, 
Brid. Briol. univ. Y, p. 7943? (fide B. et S.) 
Han. Frequent on trees in the Castle-Howard Woods. 
This may be distinguished at sight from O. erispum by the 
leaves being much less crisped when dry; they are besides 
narrower and more widely areolate. Vaginula larger, usually 
more hairy, Pedicel longer. Capsule larger, less clavate, 
more widely areolate, the strie narrower and deeper-coloured. 
Operculum larger, and mostly tapering more suddenly from 
à shorter base, yet certainly variable in this respect. Cilia 
filiform, from an expanded. base, (in O. crispum, subulate, 
broad, and composed of two rows of cellules). 
12. Orthotrichum fastigiatum, Bruch. in Brid., * monoicum, 
Subpulvinatum ; caule ramoso, ramis fastigiatis; foliis 
erecto-patentibus, patulisve, siccitate imbricatis, ovato- 
latis, costato-carinatis ; capsula pyriformi-oblonga, 
