400 HEPATIC.^. 



•i mm. ; antlieridia "15 mm. x '1 mm. ; innermost bract '5 mm. 

 long X "35 mm. broad ; pistillidia '1 mm. long x "035 mm. broad ; 

 spores '01 mm. diam. ; elaters •] mm, long x -01 mm. broad. 



Hab. — Growing on soft sandstone in alpine localities. Ex- 

 tremely rare. 



7. Clogwyndu Arddu, Snowdon, Carnarvonshire, August 1<S81, 

 ir. H. p. 16. Moidart, West Inverness, S. Al. Macvicar, 1889. 



Found on the Continent ( Weiss- wasser, Germany, G. LimpricJif). 



Obs. — I publish this species with some little hesitation, having 

 spent much time and wearied my eyes with taking sections after 

 sections — which is no easy task, as the type is a very small one — 

 and am still somewhat undecided as to its merits as a good 

 species. 



It is supposed to be distinguished from Marsifpd/n oliracea. 

 Spruce, by its more rigid habit, the more oblong oval leaves, the 

 innermost bracts being quite free from the outer, the absence of a 

 tubular perianth, and the convexity of the calyptra being covered 

 with the sterile pistillidia. All these characters I have found on 

 the Snowdon plants, but they are growing with MarsiqjeJIa 

 olivacea, which has been found having free innermost bracts and 

 not a perfect tubular perianth. 



Further investigation may bring more light to bear on these 

 minute species ; meanwhile I give what information I have been 

 able to gather from others and from my own observation. 



In 1833 Nees von Esenbeck published in his admirable Nat. 

 Eur. Leb. his GjjmnomHrium. adu-^iuin, founded on specimens 

 collected by Funck on the Fichtelgebirge. In 1845-6, Dr. Spruce 

 collected on the Pyrenees a small Sarcoscijphis, which he identified 

 with the Gijmi. adu^fiuu of Nees, and removed it to the genus 

 Sarcosct/phifs on account of finding it to have a true perianth. 

 Dr. Gottsche, after examining the specimens collected by Funck 

 in the Neesian Herbarium, confirmed Dr. Spruce's view ; so the 

 matter remained until Gustav Limpricht, of Breslau, having 

 occasion to study this group about the year 1881, examined 

 specimens from Funck in the Nees Herbarium, and found there 

 were really two species which had undoubtedly been confounded 



