NEW LICHENS. 157 
and the apothecia are not black, not so spherical, nor so 
much raised above the thallus. 
TRYPETHELIUM, Ach. 
1. T. luteum, Tayl.; squamis tumidis, luteis, oblongo-rotun- 
datis, demum confluentibus, convexis; substrato atro, in- 
terstiali, elevato, gemmas albidas granulatas ferente; ver- 
rucis tenuibus lutescentibus ; apotheciis elevatis, solitariis 
binisve, atris, poro latiori. 
Has. On bark; Madras; Dr. Wight, Hook. herb.—Patches 
nearly two inches wide. Scales when dry of a tawney ash 
colour, when wet deep tawney, rather evenly scattered: in 
the interstices black tartareous matter rises above the level 
ofthe scales. The stroma or covering of the perithecium 
is thin, tawney, sometimes disappearing by age: the hard 
black perithecium surrounds the pale gelatinous nucleus. 
To this species the white granular buds on the interstitial 
matter seem peculiar. is 
2. T. bicolor, Tayl.; crusta pallide lutescenti, tenui, conditus. ec 
ineequali; verrucis subprominentibus, angustis, flexuosis, — 
confluentibus, pruinosis, rufescenti-brunneis, albido limi- p 
tatis; ostiolis minutis, crebris, subemergentibus, atris. — 
Has. On bark; Howison’s Poort, near Graham" s Tc 
Zeyher, Hook. herb. —Patches wide. Crust ve 
numerous evenly scattered smooth 
the hollows of which the warts occur pe a] vn 
colour. Perithecium black, enclosing the pale gelatinoas 
nucleus : denk exhibits "under : a lens ee filiform 
the depres nes ye 
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