MR. G. E. HUNT ON BRITISH MOSSES. 101 



Hab. Discovered near Glasnevin, Dublin, on the top of 

 a sandstone wall, by Mr. David Orr. 



It has no nearly related European allies. 



Weber a Breidleri, Juratzka (fide Fergusson) . 



Dioicous, growing in extended light-green patches, pro- 

 cumbent in the lower part, which is of a reddish-brown 

 colour; stems about if inch long, leaves ovate, decurrent, 

 erecto-patent, concave, serrated towards the apex, margin 

 recurved; nerve thin, vanishing below the apex; areolae 

 rather large, upper ones narrow- elongate, acute at both 

 ends, lower ones narrow-elongate, quadrangular. Male 

 flower terminal, discoid ; outer perigonial leaves spreading, 

 elliptic-lanceolate, longer than the stem-leaves, saccate at 

 the base, margin strongly recurved, apex cucullate, ser- 

 rated; inner perigonial leaves obovate, suddenly acumi- 

 nated, serrated at the diaphanous apex, areolae large, elon- 

 gate-quadrangular ; antheridia subsessile, with short fili- 

 form paraphyses. Pericheetial leaves linear lanceolate, 

 recurved at the margin, strongly nerved, nerve vanishing 

 below the apex; seta geniculate near the base, slender; 

 capsule oval, pendulous, glaucous green when young, pale 

 reddish brown when mature. 



Fruit matures July to August. 



Hab. Abundant on wet debris of slaty rocks near springs 

 on the tablelands above the head of Glen Callater, also on 

 Loch-na-gar, and in Canlochan Glen. 



Its companions above Glen Callater aveDicranum Starkii, 

 D. falcatum, Oligotrichum hercynicum, and Polytrichum 

 seocangulare. In the springs themselves abound the fol- 

 lowing, viz.: — Philonotis, several species; Splachnum vas- 

 culosum, Mnium cinclidioides , and several allied species; 

 Hypnum eocannulatum, H. falcatum, Thuidium decipiens, 

 Webera albicans, var. glacialis, and numerous other inter- 

 esting plants. 



