108 LICHENES. [Collema. 



nate ; apothecia of a tawny brown, with a thick, subcrenate, 

 olive border. Ach. Syn. p. 31 1. Eng. Bot. t. 1912. 



On the ground at the Dargle River, County of Wicklow ; Dr. 

 Whitley Stokes. Near Bantry, Miss Hutchins. Our specimens 

 differ from the Eng. Bot. figure and description only in having the 

 lobes more deeply crenate, the crenulations tumid, and the apothecia 

 large, irregular, their disk waved and brownish. 



3. C. cristatum, Hoffm. Thallus thick, olive-black, compact; 

 lobes imbricated, incised, dentate, erect, those of the circum- 

 ference depressed ; apothecia flattish, depressed, large, dark red- 

 dish brown, the margin nearly entire. Hoffm. Fl. Germ. p. 101. 

 C. pulposum. 7. cristatum, Ach. L. U. p. 633. Jacq. Coll. 3, t. 

 12,/. 1. 



On mortar, and on the soil : near Belfast, Mr. Templeton : at Dun- 

 kerron, County of Kerry. 



4. C. synalissum, Ach. Thallus with obovate, thick, entire, 

 rather concave lobes, glaucous green when fresh, olive-brown 

 when dry, covered with closely set, substipitate, round or oblong 

 buds. " Apothecia minute, aggregate, obovate, concolorous, 

 their disk depressed, collected into substipitate knobs.'' Ach. 

 L. Un. p. 640. 



On a sand bank, near Belfast, Mr. Templeton ; County of Derry, 

 Mr. D. Moore. Our specimens are destitute of apothecia ; in all 

 other respects they accord with the Acharian description. 



5. C. glomerulosum, Ach. Thallus minute, subrotund, brown- 

 ish-black, coriaceous, with tumid processes, scattered ; apothe- 

 cia immersed on the tops of the processes, minute, concave, 

 brownish-black. Ach. L. Un. p. 641. 



On the bark of young a9h at Roughty, County of Kerry. Thallus 

 in dispersed cushions scarcely as large as peas ; it alters very little its 

 hue or its size by being wet ; rough with protuberances on the surface : 

 affixed by a central spot, free beneath at the edges, easily detached ; 

 dissected it appears a coriaceous sac, with irregular processes, contain- 

 ing within much pale subfibrous matter. Apothecia consisting of 

 nearly uniform opaque dark-brown matter. This cannot be con- 

 founded with any other described British species. Acharius states 

 the apothecia to be sessile, but dissection shows this appearance to 

 arise from a slight contraction of the process of the thallus beneath the 

 apothecium. 



6. C. limosum, Ach. Thallus subeffuse, lobes appressed, 

 thick, slightly crenulate, almost evanescent in drying ; apothe- 

 cia immersed, the disk reddish-brown, the margin somewhat 

 prominent, nearly entire. Ach. L. Un. p. 629. Eng. Bot. Supp. 

 t. 2704, /. 1. 



On wet clay. Near Belfast, Mr. Templeton ; near Dublin, and at 

 Dunkerron, County of Kerry. 



7. C. multipartihim, Smith. Thallus orbicular, radiating, at 

 length open in the centre ; lobes smooth, repeatedly branched, 



