406 HEPATIC^. 



antlieridia terminal or rarely situated at the middle of the stem ; 

 perigonial bracts little different from the others, slightly swollen 

 at the base and rather broader ; antlieridia few, oval, the outer 

 layer persistent ; bearers as long or longer than the antheridia 

 (some 12 cells long). 



Fruits May, June. 



Dimensions. — Stems i to l inch long, "2, mm. diam., with 

 leaves '2 mm. to "3 mm. wide; leaves -9 mm. long x -7 mm. 

 broad, '85 mm. x 7 mm., '65 mm. x "5 mm., segments "25 mm. 

 high X from 'lo mm. to '4 mm. broad at the base; cells 

 •05 mm. X '025 mm., "04 mm. x '03 mm., "04 mm. x '02 mm., 

 •03 mm. X '02 mm. ; marginal cells '02 mm. x "02 mm. ; 

 trigones "0075 mm., bracts "9 mm. long x "7 mm. broad, 

 segments "2 mm.; pistillidia "15 mm. long x "05 mm. broad ; 

 antheridia '25 mm. x 'IS mm. 



Hab. — Grows on exposed rocks in subalpine and alpine 

 localities. Not uncommon in North Wales, the Lake District, 

 and Scotland. 



7. Cader Idris, Merionethshire, U. M. llohues ; IF. II. P. ; 

 Cvvm Bychan, Merionethshire, G. A. Ilo/f ; Llanberis and Snow- 

 don, Carnarvonshire, E. 31. Holmes, J. 11. Byrom, James Neild. 

 12. Harter Fell, Mardale, G. Stabler; Hill Bell,/. A. Marluidale 

 (^- G. Stabler; Long Sleddale ; Langdale, Westmorland, G. 

 Stabler. 15. Loch-na-gar, J. ^- T. Sim. 16. Glen Finnan, Dr. 

 Carrin(jton ; Moidart, West Inverness, S. M. Macvicar, rare on 

 low ground, but descends to sea-level ; common on the hills from 

 1200 ft. to 2000 ft. 



I. Mwellrea Mountains, Co. Mayo, Dr. B. Moore, 1874; 

 Slieve Donard and other mountains in the North, Bevs. Lett & 

 Waddell. 



Found on the Continent. 



Obs. — From Cesia concinnata (Lightf.)it may be distinguished 

 b}" its rounded, obtuse, finely crenulate segments, closel}^ and 

 regularly imbricating leaves, bifariously inserted, never secund 

 (as Lindberg remarks). 



Cesia ereuiilata (Gott.) is a widely different species, with finer 



