lophothelium] pyeenidiace^ 265 



Univ. p. 300 (1810). E. laetevirens Turn, ex Hook, in Sm. Engl. 

 PL V. p. 158 (1833) ; Tayl. in Mackay Fl. Hib. ii. p. 101 ; 

 Leight. Angioc. Lich. p. 12. Verrucaria laetevirens Borr. in 

 Engl. Bot. Suppl. t. 2658 (1830). Normandina viridis Nyl. in 

 Act. Soc. Linn. Bord. ser. 3, i. p. 420 (1856); Mudd Man. 

 p. 269. N. laetevirens Nyl. Lich. Scand. p. 264 (1861) ; Cromb. 

 Lich. Brit. p. 107 ; Leight. Lich. EI. p. 408; ed. 3, p. 440. 

 Exsicc. Leight. n. 25 ; Mudd n. 258. 



Hab. On turfy soil, on mosses in bogs, etc. — Distr. Somewhat 

 frequent in the Channel Islands and throughout England and Wales, 

 among the G-rampians, Scotland and in Ireland. — B. M. Guernsey; 

 Helmen Tor, Cornwall ; Ardingly Eocks, Tunbridge Wells and Mares- 

 field, Sussex ; Esher, Surrey ; Hungershall Rocks, Kent ; Oswestry, 

 Shropshire ; Barmouth, Arran Penthyn and Cwm Byohan, Merioneth ; 

 Aber, Camedd Dafydd, and Sychnant near Conway, Carnarvonshire ; 

 Black Edge near Buxton, Derbyshire ; Broughton Bank and Ingleby 

 Moor, Cleveland, Yorkshire ; Teesdale, Durham ; Ben Ledi and Ben 

 Lawers, Perthshire ; DoneraileMt., Cork; Mangerton, Kerry ; Conne- 

 niara, Galway. 



99. LOPHOTHELIUM Stirton in Scott. ISTat. ix.p. 37 (1887). 

 Thallus crustaceous. Algal cells Cyanophycese {Nostoc ?). 



Perithecia immersed in prominent tubercles ; paraphyses distinct, 

 soft ; spores 8 in the ascus, septate, brown. 



Included in this Natural Order on account of the blue-green 

 gonimia, but possibly with quite other affinities. In the absence of 

 specimens it is impossible to do more than suggest the classification. 

 Stirton himself considers that the tubercles indicate some connection 

 with Trypetheliacese, or might be in the nature of parasites on other 

 lichens. Stirton states that they are colourless internally, no gonidia 

 or gonimia being found in them. 



1. L. acervatum Stirton torn. cit. p. 39. — Thallus crustaceous, 

 thickish, dark-brown, minutely wrinkled, sprinkled with whitish 

 cephalodia resembling the phyllocladia of Stereocaulon, and con- 

 taining greenish-yellow algal cells. Fertile tubercles numerous, 

 pale-coloured, up to 1 mm. across ; perithecia 8-50 in each 

 tubercle ; perithecial wall thin, brownish-black ; paraphyses 

 rather sparse and long ; spores often unisei'iate in the ascus, 

 obovate, colourless, then dark-brown or nearly black, 1-septate, 

 one cell small and triangular, 0,016-25 mm. long, 0,008-12 mm. 

 thick ; hymenial gelatine yellowish-brown with iodine. Specimen 

 not seen. 



Hab. On turfy ground. — Distr. Ben Lawers, Perthshire. 



100. OBRYZUM Wallr. Naturg. Flecht. p. 263 (1825) 

 emend. ; Nyl. in Flora lii. p. 353 (1872). (PI. 36.) 



Thallus none. Perithecia minute, globose, parasitic, im- 

 mersed in the tissue of the host-plant or almost superficial, 



