546 DR LAUDER LINDSAY ON NEW LICHENICOLOUS MICRO- FUNGI. 



C. bellidiflora — as an appropriate name — Abrothallus Moorei,* in honour of the 

 distinguished Director of the Botanic Garden of Glasnevin, Dublin, who has made 

 so many important contributions to the Irish flora — cryptogamic as well as 

 phsenogamic. 



The protothallus of various Cladonke is affected by Nesolechia punctum, Mass. 

 (Korber, Parerga, p. 461), the sporidia of which are minute, linear-fusiform, 

 simple, and hyaline. 



9. On thallus of Squamaria crassa, Huds.; Crosshaven, Cork Harbour, Sullivan. 

 Parasite occurs as deep bluish-black round maculae, surrounded frequently by a 

 black ring; both conspicuous on the buff-coloured thallus of the host; seated on a 

 sort of thalline papillae ; body immersed. Paraphyses Verrucarioid — very delicate, 

 wavy, filiform, indistinct — not knobbed nor coloured at tips; asci -0028'' long, and 

 •00066" broad. Sporidia brown, soleaform, -00050" to -00066" long, -00025" broad ; 

 while in the asci always have the broadest and shortest end upwards. 



This parasite is obviously different from the Spliceria squamarioides and S. 

 gelidaria of Mudd. (Brit. Lich. p. 130), which affect the thallus of Squamaria 

 gelida, L. 



Nor does it appear to be any of these parasites which copiously affects the 

 apothecia of S. saxicola, Poll., in a specimen which I collected near Jerkin, Nor- 

 way (4600 feet), in August 1857. I have not in this case, however, been able to 

 detect reproductive structure. In its young state the parasite appears as black 

 spots on the epithecium. These gradually increase in number, and at length 

 coalesce till they cover the whole disk; which covering leads apparently to the 

 degeneration and consequent shrivelling of the whole apothecium. Its outline 

 becomes most irregular ; both exciple and disk acquire a very black granular 

 surface, while the whole apothecium decreases in thickness. At a later stage it 

 appears as a very black shapeless granular mass, frequently crowded or confluent, 

 conspicuous on the pale stramineous thallus. 



Nylander (Scand. p. 133), describes a parasitic Sphceria as affecting, in some 

 parts of Scandinavia, Squamaria saxicola and S. chrysoleuca, Sm. It is black, puncti- 

 form, immersed in the thallus; spores fusiform, colourless; possessed of spermo- 

 gonia, which are also black and punctiform, containing minute straight spermatia. 

 Korber (Parerga, p. 458) describes Conida clemens, Tul. (Mem. p. 124, sub 

 Phacopsis) as parasitic on the apothecia of Squamaria chrysoleuca and saxicola ; 

 the sporidia being small, irregularly oblong, 1-septate, and hyaline. Also Cerci- 

 dospora Ulothii (Parerga, p. 466), as affecting the thallus of S. saxicola ; sporidia 

 fusiform or cymbiform, 1-septate, and hyaline. S. saxicola is also affected with 

 Lecidea micraspis, Smrf., and Thelidium epipolytropum, Mudd.f 



* In my MS. Notes on Moore's Irish Lichens — made in 1858 — I named this parasite pro- 

 visionally Abroth. Cladoniarum, but any such specific designation is apt to lead to confusion with 

 Nylander's Lecidea Cludoniaria. 



f Vide Paper on " Parasitic Micro-Lichens" (antea eltat.). 



