404 Transactions.— Botany. 
Quasi inter Opegrapham et Graphidem intermedia. 
15. Opegrapha intertexta, sp. n. 
Thallus albo-cinereus tenuis levis continuus. Apothecia madefacta 
innata, lirelleformia, lirellis simplicibus v. subramosis angustissimis rectis v. 
flexuoso-contortis ipsis intermiatis, hymenio incolore, perithecio atro integro, 
paraphysibus clathrato-ramosis. Spore in ascis subpyriformibus minute 
incolores subfusiformes 1-8-septate, longit. 0:012 mm., crassit. 0:008 
mm. 
Ad cortices arborum. 
Obs.—Quasi inter Opegrapham et Graphidem intermedia. 
16. Graphis strigata, sp. n. 
Thallus tenuis e albo cinerascens, nitiusculus colliculosus v. verrucosus, 
fissus, interdum versus ambitum areolatus. Apothecia palmato-divisa, 
lirellis a thallo niveo subprominente cinctis, apicibus attenuatis, disco lato albo- 
pruinoso, a lineis nigris striato, raro nudo, tum atro; excipulo atro-fusco 
laterali; hymenium dilute fuscum hypothecio concolore tenui enatum, para- 
physibus rectis arcte adglutinatis grumosis. Spore in ascis cylindricis 
oblonge hyaline 4-cellule, cellulis lentiformibus limbatis, mox fusce 
emortue collapse, longit. 0:02 mm., crassit. 0:008 mm. 
Ad cortices arborum. 
Arcte affinis est Graphidi subtricose (Knight, Linn. Trans., vol. ii., 1882), 
sed apotheciis pruinosis strigatis, et thallo passim verrucoso, quare specie 
differt. 
17. Graphis librata, sp. n. 
Thallus tenuis pallide fusco-ochraceus continuus linea atra limitatus. 
Apothecia atra lirelleformia angusta sepissime simplicia rectiuscula librata 
clausa, madefacta innata, excipulo atro integro v. subintegro, hymenio 
incolore, paraphysibus distinctis ramosis. Spore oblonge 4-5-cellule, 
cellulis lenticularibus incolores, longit. 0017 mm., crassit. 0:006 mm. 
Ad cortices arborum. 
18. Fissurina rugosa, sp. n. 
Thallus cinereo-olivaceus tenuissimus rugoso-verrucosus, verrucis ex apo- 
thecio fissus. Apothecia longit. circiter 1 mm. in matrice subinflata dilace- 
rata immersa, flexuosa pervaga simplicia conferta, intus incoloria, marginibus 
thalloideis tenuibus in latitudinem vix laxatis (in sectione supra fuscescentibus) 
paraphysibus adglutinatis gracilibus apice haud coloratis. Spore in ascis 
cylindrico-elongatis ovate hyaline demum fuscescentes, normaliter unise- 
riales, 4-cellulm, cellulis lenticularibus, longit. 0-018 mm., erassit. 0:009 
Ad cortices arborum, 
