544 DR LAUDER LINDSAY ON NEW LICHENICOLOUS MICRO-FUNGI. 



V. epidermidis are certain other perithecia — scattered, round, minute, punctiform 

 — somewhat prominent. Instead of paraphyses of ordinary character, the para- 

 site possesses long, delicate, branching filaments, like those of many lichen-sper- 

 mogonia. Asci are frequently grouped and ribbon-shaped ; giving a faint blue 

 reaction with iodine ; 8-spored. Sporidia ellipsoid, colourless, 1-septate, exactly 

 like those of Verrucaria gemmata. The same hymenium, which contains spori- 

 diiferous asci and ramose paraphyses, contains also stylospores, oval or ellipsoid, 

 00066'' long; borne on long filiform basidia, resembling paraphyses ; sometimes 

 1-septate; occasionally exhibiting 3 nuclei, central largest. 



2. Associated with Physcia obscura, Fr., var. leprosa, Hepp; Morchone, Brae- 

 mar; corticolous; Aug. 1856, W. L. L. (Mem. Spermog. p. 247.)— Black and 

 punctiform, but exhibiting no reproductive structure. 



3. Associated with Lecidea ferruginea, Huds., var. sinapisperma, DC. ; on 

 dead mosses, grasses, twigs of shrubs, &c. ; Hepp Exsic. No. 200 (sub-nom. 

 Placodium. sinapispermum, DC.) — Scattered over the decayed vegetation on which 

 the apothecia of the Lecidea occur, and apparently partly intermixed with them, 

 are very minute, black specks, which are perithecia, containing brown, 3-septate, 

 ellipsoid, largish sporidia or spores. 



4. On thallus of Lecanora polytropa, Ehrh., var. intricate, Schrad., Penman- 

 shiel, Berwickshire; Hardy, Novem. 1856; saxicolous— Parasite occurs on thalline 

 areolae as punctiform and black conceptacles, very minute, sometimes papillae- 

 form and Verrucarioid, varying in size ; full of corpuscles, which may be either 

 sporidia or stylospores (for neither asci nor basidia were observed), these re- 

 productive corpuscles being very variable in size and shape — spherical to 

 figure-8-shaped, simple to 1-septate, and colourless. The parasite is certainly 

 not the Thelidium epipolytropum of Mudd (Brit. Lich. p. 298). I have also met 

 with what appears to be the latter, externally resembling Verrucarioid spermo- 

 gonia, and containing ellipsoid, 1-septate sporidia, with pale yellow loculi, but 

 having no distinct paraphyses ; while Mudd describes the paraphyses as distinct 

 in his plant. 



5. On apothecia (disk) of Physcia chrysophthalma, L., var. Dickieana, Linds. 

 (Nyl. and Mudd, Brit. Lich. p. 112; sub-nom. var. of Physcia villosa, Dub., in Linds. 

 Mem. Spermog., plate xiii. fig. 14) ; Belfast, Prof. Dickie. — Parasite consists of 

 small, round, brown, quite superficial papillae or points, easily removable. Its 

 envelope is composed of dark brown or bluish-brown cellular tissue, but the 

 conceptacle contains no sporidia, stylospores, nor spermatia. 



6. On thallus of Lecidea albo-atra, Fr.; shore of Great Island, Cork, Carroll, 

 Sept. 1858.- — Parasite is studded over areolate thallus as black papillae, generally 

 crowded ; varying in size ; frequently flattened and irregular in form ; semi- 

 immersed ; sometimes confluent, and then very difform. 



7. With Verrucaria fusiformis, Leight.; Douglas, near Cork; on ash; Carroll, 



