350 Dr. W. Nylander on new British Lichens. 
Gelatina hymenea iodo vinose rubens (precedente cerules- 
cens). 
Ad saxa arenaria (“greensand”) prope Maidstone in Kent. 
(Admiral Jones.) 
Collema psorellum, Nyl. 
Thallus nigricans vel fusco-niger, tenuis, rugosus vel subgranu- 
lato-ineequalis, diffractus, determinatus ; apothecia rufescentia 
vel fusco-rufa, parva (latit. 0°3-0:4 millim.), subbiatorina ; 
sporee (solite hujus generis, submurali-divise,) longit. 0°023- 
0:035 ‘millim., crassit. 0-O12-0°016 millim. Gelatina hy- 
menea iodo intense czerulescens. 
Ben Lawers, ad saxa micaceo-schistosa. (Admiral Jones.) 
Thallus intus glomerulose compositus. Apothecia vulgo ob- 
tuse marginata, dein explanata margine excluso. 
Lecidea obsoleta, Ny). 
Thallus nullus proprius visibilis; apothecia nigra, minuta (latit. 
circiter 0-3 millim.), opaca, margine obtuso vel non distincto, 
intus concoloria; spore 8"®, incolores, oblongze, simplices (vel 
septo obsoleto), longit. 0-009-0:011 millim., crassit. 0-003 
mullim. ; paraphyses fere mediocres, discrete, apice subclavato, 
incrassato, subincolore, (vel epithecium dilute vage nigrescens,) 
hypothecium sordide fuscescens. Gelatina hymenea iodo vix 
tincta. 
Sussex Downs, prope Lewes, ad cretam. (Admiral Jones.) 
Locum habeat prope L. neglectam, Ny). 
Arthonia melaspermella, Nyl. 
Thallus vix ullus vel macula diffusa pallescente indicatus; apo- 
thecia nigra (vel fusco-nigra), plana, sat parva (latit. circiter 
0:5 millim.), marginata (margine subcrenulato, demum 
evanescente) ; spore 8”, fusco-nigrescentes, oblongo-ovoidee, 
1-septate, longit. 0°011-0°015 millim., crass. 0-0045 millim. 
Gelatina hymenea iodo dilute czerulescens. 
In Anglia, prope Londinum, ad lignum legit Currey ; apo- 
thecia rotundata lecideiformia facile seriatim secus fibras ligni 
disposita. 
Verrucaria advenula, Nyl. 
Similis Verrucarie endococcotdee, sed differens sporis, quee sunt 
oblongee (demum fuscescentes), 3-septatze (ad septa seepius 
constrictiuscule), longit. 0°015—0-020 millim., crass. 0-006- 
0:008 millim. (non iodo tinctee). Gelatina hymenea iodo 
vinose rubens. 
Supra thallum Lecidee eacentrice prope Killarney in Hibernia. 
(Admiral Jones.) 
