NEW BRITISH LICHENS. 
91 
mm. long, 0*006 mm. thick, epithecium brown, paraphyses mode- 
rate, hypotliecium colourless ; hymenial gelatine yellowish (the 
thecfe tawny wine-coloured-) with iodine. 
On porphyritic rocks. Red Scues, Westmoreland (Martindale). 
Belongs also to the section of L. rivulosa. 
10. Lecidea periplaca, Nyl. in Flora, 1882, p. 454. 
Thallus greyish-black, thin, or very thin, subsmooth, thinly areo- 
lato-rimulose, subbyssoid and applanato-placodioid at the circum- 
ference; apothecia black, margined, at length convex, internally 
pale; spores 8 nee, ellipsoid, 0*009-0*010 mm. long, 0*006 mm, 
thick, epithecium and perithecium brown, paraphyses submoderate, 
thalamium slightly yellowish-brown, hypothecium colourless ; 
hymenial gelatine bluish, and then yellowish (the thecae wine-red), 
with iodine. 
On stones of walls. Stavely, Westmoreland (Martindale). Be- 
longs to the section of L. tenebrosa. 
11. Vexrucairia interseptula, Nyl. in Flora, 1881, p. 453. 
Thallus olivaceous, opaque, thin; apothecia subconically convexo- 
prominent, the pyrenium dimidiately black, epithecium not im- 
pressed ; spores 8 nae, colourless, fusiform, 5-septate, with one or 
two longitudinal or oblique septules, 0*020-24 mm. long, 0*006-7 
mm. thick. 
On moist siliceous rocks. Wastdale, Cumberland (Rev. W. 
Johnson). Belongs to the section of V. chlorotica, the thallus 
containing chrysogonidia. 
12. Verrucairia canella, JVyl. in Flora, 1883, p. 102. 
Subsimilar to Verrucaria amphibola or glaucina, but at once 
distinguished by the spores being subfusiform, 0*025-32 mm. long, 
0*007-0*011 mm. thick. 
On calcareous rocks. Bangor, N. Wales (J. Griffith). 
13. Verrucaria globosa, Tayl. in Mss., Nyl. in Flora, 1883, p. 534. 
Thallus greyish or greyish-greenish, thin, unequal, continuous; 
apothecia yellowish or yellow flesh-coloured, pertusarioid, sub- 
globoso-mastoid, often externally covered by the thallus ; spores 
8 n^, fusiform, 7-septate, 0*050-70 mm. long, 0*010-14 mm. thick ; 
the spores only in the protoplasm tinged tawny-yellow, with iodine. 
On trachytic rocks. Blackwater, Kerry (Taylor). Belongs to 
the section of F. mastoidea. 
ADDITIONS TO THE BRITISH CLADONIEL 
The following varieties and forms have to be added to those 
recorded in my enumeration (yid. Grevillea,” 1883, pp. 111- 
115):— 
1. Cladonia degenerans, var. pleiolepidea, Nyl. 
Rare amongst the N. Grampians. Morrone, Braemar. 
2. Cladonia furcata racemosa, f. palamsea, Ach. 
Rare in S. England. Shiere, Surrey. 
