‚672 oo. 0 
An Account of Rhiz oma medullaris, a new 
British Fungus. By J. E, Smith. 372. 
Some Account of the Islands of Tristan da 
. Cunha and of its natural "productions.' By D. 
Carmichael. 483. 
. Charäcters and Description of Lyellis,a 
new Genus of Mosses, with Observations’ on the 
Section of the Order to which it belongs ; and 
some Remarks, on Leptostomum and Bux- 
baumia. By R..Brown, 3560. 
00007 Lyellia . 
Stoma fedentulum, clausum epiphragmate (era 
so depresso), Cujus discus eircularis a limbo 
Clatiori ) persistenti setedens, cum solumella Ye. 
znanenti inclusa cohaeret. ° . x 
Capsula hinc ‚plana inde convoxa, 
Calyptra cucullata. (apice pilosa.) 
Muscus ‘( Nepalensis) habitu Polytrichiz: cap- 
sulae figura et structura interiori Dawsoniae sie 
milis; peristomio ab utroque genere diversissimus. 
Lyellia crispa. 
Descriptio, 
‘Muscus. caespitosus. Caulis. erectus, simpli 
eissimus, 3 — 4 uncialis,.ipsa basi. tomento: radie 
eali cinereo Copioso tenuissimo tectus, dein ad 
1/5 eireiter longitudinis basibus emareidis 3 folio- 
zum squamatus, supra dense foliatus. 
Foliä undique versa, e basibus dilatatis sub» 
Cuneatis semivaginantibkus ‚membranaceis zallidie 
