Dr. Nylander on new British Lichens. 63 
Like O. lentiginosa, Lyell, but smaller, though with larger 
spores. 
14. Verrucaria tristicula, Nyl. 
Thallus fuscus, tenuiter granulosus, effusus; apothecia nigra, 
perithecio (sensu altitudinis ellipsoideo, latit. 0-4—0-5 millim.) 
integre nigro firmo ruguloso subconice prominulo, epithecio 
punctiformi-impresso ; thecze vulgo monosporee ; spore fuscee, 
murali-divisee, oblonge, longit. 0°070-0°120, crassit. 0°023- 
0:036 millim.; paraphyses nulle. Gelatina hymenea iodo 
vinose rubens. 
Discovered by Admiral Jones, on mosses (Weisia) in Aber- 
deenshire, Scotland. 
A remarkable species, approaching V. gelatiosa, Ach. 
15. Verrucaria nigritella, Ny). 
Thallus niger, magmoideus (forte non proprius, initiis algologicis 
compositus) ; apothecia nigra, sat parva (latit. 0°L7—0°25 mil- 
lim.), perithecio integre nigro, nonnihil prominulo, epithecio 
vix impresso ;_ sporee fuscee, ellipsoideze vel oblongo-ellipsoidez, 
varie divise, longit. 0°021—0-036, crass. 0°009-0'014 millim. ; 
paraphyses nulle. Gelatina hymenea iodo vinose rubescens 
vel fulvescens. 
Discovered by Isaac Carroll, Esq. (1864), between the scales 
of the thallus of V. tephroides, Ach., on the earth at the top of 
Ben Lawers. 
The spores are nearly similar to those of Urceolaria scruposa, 
Ach., and are much smaller than those of V. nigrata, Nyl. 
16. Verrucaria leptotera, Nyl. 
Thallus obscure olivaceus vel olivaceo-nigrescens, levis, sub- 
nitidiusculus, indeterminatus, sat tenuis; apothecia nigra, 
minuta, subinnata; spore incolores, oblong, 1-septatz (al- 
tero apice paullo crassiores), longit. 0°016—0-018, crassit. fere 
0:005 ; paraphyses nulle. 
Discovered by Charles Larbalestier, Esq., on maritime rocks 
in the island of Jersey. 
Externally very similar to Verrucaria mucosa, Ach. Possibly 
only a variety of V. consequens, Nyl. (in ‘ Flora, 1864, p. 357), 
differing by the smaller apothecia and narrower spores. 
17. Verrucaria innata, Nyl. 
In thallo Lecidee Hookerii, Scher., innata, minuta, perithecio 
integre nigro ; spore 8"®, incolores, ovoideze, 1-septatz, longit. 
0:018—-0-028, crass. 0-°008-0°011 millim. ; paraphyses parce, 
