( 263) 
Nyl. (Tichothecium, Mass., Koerb. Parerg.) a little group of minute 
parasites on rock- and it now appears (Nyl. N. Gran.) on bark-lichens is 
however, irrespective of its certainly questionable lichenose character 
(Th. Fr. Gen. p. 112) not well to be distinguished from Pyrenula ; and 
was originally referred by Koerber (Syst.) to the same cluster which 
includes P. thelena (Microthelia, Koerb.) as it is now by Stizenberger. 
— Melanotheca, Nyl., distinguished by him as differing from Verrucaria 
‘ eque ac Glyphis a Graphide’ (Pyr. p. 69) includes as well a brown-spored 
lichen (Melanotheca pr. p., Fée) as a cluster of forms with colourless, 
culminating in acicular spores; and the latter group (Zomasellia, Mass.) 
however associable with the former, should seem, from the point of view 
of this book, to belong to a different spore-series. ——And finally, in 
Strigula, Fr., we reach perhaps the extreme limit of the class in this 
direction; this little cluster of epiphylline plants, having been originally 
discribed as a type of pyrenomycetous Fungi, and deserving, now that its 
lichenose character is allowed, scarcely more than the last place. 
LXVI.—SAGEDIA (Mass.) Koerb., emend. 
Koerb. Syst. p. 362. Verrucarie sp., Ach. L. U. p.51; Syn. pp. 88,94. Fr. 
L. E. p. 448. Borr. in E. Bot. Suppl. t. 2597, f.1. Wallr. Fl. Crypt. 
Germ. 1, p. 299. Scher. Spicil. p. 342. Leight. Brit. Ang. Lich. pp. 42, 
53, t. 18, f. 1,2; t. 23,3. Nyl. Prodr. p.186; Pyrenoc. p.36; Lich. 
Scand. p. 277. Sagediz spp. (& Porine sp.?) Massal. Ric. pp. 159, 191. 
Pyrenule spp., Naeg. & Hepp in Hepp Flecht. Eur. t. 2. Sagedia 
pro. p., Anz. Catal. Sondr. p. 106. Segestriesect., Th. Fr. Gen. p. 106. 
Sagedia pro p., (& Porine sp. ?) Stizenb. Beitr. 1. c. pp. 147, 149. Ar- 
thopyreniz spp., Mudd Man. Brit. Lich. p. 299. 
Apothecia innato-superficialia, perithecio distincto atro, amphi- 
thecio pallido 1. dein nigricante, paraphysibus capillaribus, 1. nunc 
diffuxis. Spore ecymbiformi fusiformes 1. clavate, dein aciculares, 
quadri-pluriloculares,incolores. Spermatiahaud visa. Thallus crus- 
taceus, uniformis, evanidusve. 
As compared with the next two following genera, the present, from the 
point of view at least of this treatise, may seem well distinguishable; but, 
as in those, almost all the characters are uncertain. A kindof superiority 
over the merely corticoline assemblage (Pyrenula) should seem perhaps 
to be indicated by the here evident, close affinity of the bark- to the rock- 
forms, and no less by the generally distinct, lichenose thallus; and such 
superiority to be in fact admitted, as well in the place (in his Verrucaria) 
assigned by Nylander to the group, as in Koerber’s later reference of one 
member of it (Parerg. p. 325) and Th. Fries’s of the whole (Gen. p. 106) 
to Segestria: but this difference ceases to be appreciable in certain types 
which may yet prove to be associable with the genuine Sagedi@. The 
