354 ADDENDA 



Part ii. p. 308, under Gongylia viridis. 



After G. viridis A. L. 8ra. add in Journ. Bot. xlix. p. 42, 

 t. 510, f. 2 (1911). After the description add spore size 

 up to 0'085 mm. lon^^, and under Hab. add Theydon Bois 

 and near Lough ton, Epping Eorest, Essex. 



Part i. p. 467, after L. cinerea. 



Lecanora (Aspicilia) Lilliei B. de Lesd. in Bull. Soc. Bot. 

 France, liii. p. 515 (1906).— Thallus tartareous, about 0*5 mm. 

 thick, cracked arcolate, white, yellow within (K — , CaCl — ). 

 Apothecia minute, black, immersed in the areola3, rounded- 

 difform, or lirella^form ; epithecium olivaceous, hypothecium 

 colourless ; paraphyses gelatinous-concrete ; asci narrowly clavate ; 

 spore 4-6n;e, ellipsoid, 0,013-15 mm. long, 0,005-6 mm. thick; 

 hymenial gelatine deep blue with iodine. Specimen not seen. 



Outwardly like Lecanora cinerea, but differing in the yellow colour 

 of the interior of the thallus and in the smaller spores. 



Hah. On granitic rocks, Ousdale, Caithness. (Collected bv 

 D. Lillie.) 



Part ii. p. 218, after A. lapidicola. 



Arthonia Lilliei B. de Lesd. in Bull. Soc. Bot. France, Ivii. 

 p. 34 (1910). — Thallus blackish, leprose, scanty. Apothecia 

 black, minute, about 0'l-0*2 mm. in diameter, round, plane; 

 epithecium olivaceous, hymenium colourless or faintly brownish, 

 h} pothecium colourless ; paraphyses concrete, free and capitate 

 at the tips ; asci ventricose ; spores 8nse, colourless, oblong or 

 ellipsoid, 1 -septate, the two cells equal, scarcely constricted, 

 0,010-12 mm. long, 0,004-5 mm. thick; hymenial gelatine wine- 

 red with iodine. Specimen not seen. 



Hah. On siliceous rocks, Achastle, Caithness. (Collected by 

 D. Lillie.) 



The position of the following species is uncertain : — 



Botrydina vulgaris Breb. ex Meneghini in Mem. R. Accad. 

 Sci. Torino, ser. 2, v. p. 98 (1842) ; emend. Acton in Ann. Bot. 

 xxiii. p. 579 (1909). — Thallus forming small green spherical 

 mucilaginous bodies 0,020-300 mm. in diameter, rarely larger, 

 with a central mass of green algal cells (Coccomyxa suhellipsoidea 

 Acton, torn. cit. p. 573) and a pseudo-parenchymatous envelope of 

 fungal cells which proliferate inwardly among the algse. Fruit 

 not developed. Specimen not seen. 



Considered by E. Acton to be a primitive lichen distinguished 

 from mere soredia by the structure of the fungal envelope. The 

 fungus, when grown in a separate culture, developed coiled branches 

 which suggested affinities with the Helicosporeos. 



Hah. Among bryophytes on rocks or on the ground, in damp 

 shady situations, chiefly in moimtainous districts. 



