verrdcaeia] vbeedcariace^ 287 



faintly cracked-areolate. Perithecia small, numerous, immersed 

 in the thallus, scarcely emergent, hemispherical, black ; perithecial 

 wall continuous under the base in a thin black layer ; spores 

 oblong-ellipsoid, 0,016-22 mm. long, 0,008-010 mm. thick.— 

 Leight. Lich. Fl. p. 420 : ed. 3, p. 450. V. umhrina Leight. 

 Angioc. Lich. p. 52, t. 23, fig. 2 (1850) (non Ach.) ? V. Leightonii 

 var. umlrina Mudd Man. p. 287 (1861)? V. margacea var. 

 mauroides Cromb. Lich. Brit. p. 112 (1870). 



Frequently regarded as a subspecies or variety of ihe preceding, 

 but distinguished by the thinner more eflfuse less areolate thallus, the 

 minute areolae being more easily seen when moist. 



Hah. On rocks and stones chiefly arenaceous or quartzose.- — Distr. 

 Not common throughout England and Wales.' — B. M. Levie and 

 WanUp, Leicestershire ; Malvern, Worcestershire ; Carlton Bank and 

 near Ayton, Cleveland, Yorkshne. 



25. V. cataleptoides Nyl. in Bull. Soo. Bot. Fr. x. p. 268 

 (1863). — Thallus thickish, dark-brown or blackish, cracked-areo- 

 late, determinate. Perithecia immersed in the thallus, becoming 

 emergent and prominent ; perithecial wall black or brownish- 

 black ; spores ellipsoid, narrower at the ends, 0,018-24 ram. long, 

 0,010-12 mm. thick. — V. margacea var. cataleptoides Nyl. in 

 Maine et Loire Mem. Soc. Acad. iv. p. 26 (1858). 



Hab. On rooks, granitic or schistose. 



Form ferruginosa Lamy Catal. Lich. p. 160 (1880). — Thallus 

 bright ochraceous-red, cracked-areolate; spores 0,018 mm. long, 

 0,008 mm. thick. — Shackleton & Hebden in Naturalist, 1892, 

 p. 17. Specimen not seen. 



The specimen from Yorkshire had spores 0,019-23 mm. long, 

 0,009-011 mm. thick. 



nab. On limestone crags (Malham, Yorkshire). 



26. V. coerulea DO. Fl. Franc, ii. p. 318 (1805) ; Sch»r. 

 Enum. p. 216 (1850). — Thallus bluish-lead-coloured, greyish or 

 o-reyish-brown, rather thick, determinate, faintly cracked-areolate. 

 Perithecia black, small, semi-immersed, scarcely prominent, 

 slightly depressed at the ostiole ; perithecial wall thick, entire ; 

 spores ellipsoid or oblong, 0,014-19 mm. long, 0,004-7 mm. 

 thick ; hymenial gelatine wine-red with iodine. — V. plumbea Ach. 

 Lich. 'Univ. p. 285 (1810) ; Hook, in Sm. Engl. Fl. v. p. 153 

 (1833) ; Tayl. in Mackay Fl. Hib. ii. p. 91 ; Leight. Angioc. 

 Lich. p. 45, t. 19, fig. 5 &.Lich. Fl.p. 421 ; ed. 3, p. 452 ; Deakin 

 in Ann. Mag. Nat. Hist. ser. 2, xiii. p. 36, t. 3, fig. 8 (1854) ; 

 Mudd Man. p. 288 (inol. var. cineracea) ; Cromb. Lich. Brit, 

 p. 111. Lichen coeruleus Ramond ex. DO. I. c. L. plumbosus 

 Sm Engl. Bot. t. 2540 (1813). Lithocia plumbea S. F. Gray 

 Nat. Arr. i. p. 497 (1821). 



Exsieo. Mudd n. 275 (as F. plumbea var. cineracea). 



