LECANACTIS] LECANACTACEiE 203 



who points out the affinity of V. cqyJianes with V. Icucoccphala ; but 

 the perithecia are darker in colour ; the spermatia are also much 

 smaller, about 0,005 mm. long and 0,001-2 mm. thick. 



Hob. On trunks of trees. — Distr. Rather rare in S. and N. 

 England and in S. Ireland. — B. M. Dartmoor, Devon ; New Forest, 

 Hants; Henfield, Sussex; Ickworth, Suffolk; Stogdale and Wester- 

 dale, Cleveland, Yorkshire ; Cromaglown, Eagle's Nest and Croghan, 

 Killarney, Kerry. 



Form incrustans Oliv. Exp. Syst. Lich. ii. 1, p. 46 (1900). — 

 Thallus greyish, thicker than in the species.— C^/p/ie/mm incrustans 

 Ach. in Vet. Acad. Handl. 1817, p. 230, t. 8, f. 6. Lecidea 

 ahietina f. incrustans Nyl. Lich. Scand. p. 241 (1861) ; var. 

 incrustans Cromb. in Journ. Bot. xx. p. 275 (1882). 



Hob. Incrusting mosses and hepatics on rocks. — Distr. Rare in 

 S. England. — B. M. Near Eridge, Sussex. 



3. L. illecebrosa Fr. Syst. Orb. Veg. p. 288 (1825) ; Koerb. 

 Syst. Lich. Germ. p. 277.^ — ^Thallus effuse, thin, pulverulent or 

 subgranulose, white (K — , CaCl--). Apothecia small, black, 

 plane and thinly margined, at length convex and immarginate, 

 white-pruinose, black within ; hypothecium brownish-black ; 

 paraphyses concrete ; spores fusiform, 1-5-septate ; 0,010- 

 21 mm. long, 0,003-4 mm. thick; hymenial gelatine tawny-wine- 

 reddish with iodine. — Lichen amylaceus Ehrh. Fl. Crypt, n. 303 

 (1793), nomen. Opec/rapha iUeceh'osa Duf. in Journ. Phys. 

 Ixxxvii. p. 213 (1818) (fide Fries). Scliismatomma amylaaum 

 Massal. Ric. Lich. p. 56, f. 103 (1852) ; Mudd Man. p. 222. 

 Lecidea amylacea Nyl. in Act. Soc. Linn. Bord. ser. 3, i. p. 383 

 (1856). L. corticola var. farinosa Ach. Lich. Univ. p. 187 

 (1810). L. farinosa Cromb. Lich. Brit. p. 90 (1870) (excl. 

 subsp.) ; Leight. Lich. Fl. p. 340 ; ed. 3, p. 365. 



Hab. On old trunks of trees. — Distr. Rare in S. England. — B. M. 

 Bramble Hill, New Forest, Hants. 



4. L. Dilleniana Koerb. Syst. Lich. Germ. p. 276 (1855). — 

 Thallus effuse, thinnish, soft, granular-areolate, verrucose or 

 wrinkled, greyish-white often somewhat white-pruinose i(K + 

 yellowish, CaCl -(-orange-yellow). Apothecia rather small, black, 

 appressed, sessile, plane, marginate, white pruinose or naked, the 

 margin thin, entire, or flexuose ; hypothecium blackish-brown ; 

 paraphyses slender, coherent ; epithecium brownish ; spores 

 narrowly fusiform, 3-septate, 0,023-32 nmi. long, 0,005-6 mm. 

 thick ; hymenial gelatine pale-bluish then tawny -wdne-red with 

 iodine. — Lichen Dillenianus Ach. Lich. Suec. Prodr. p. 57 t. 1, 

 f. 1 (1798). L. candidus Sm. Engl. Bot. t. 1138 (1803)? (see 

 also p. 137). Lecidea Dilleniana Ach. Meth. p. 55 (1803) ; 

 Leight. Lich. Fl. p. 332, ed. 3, p. 352 k. in Grevillea ii. p. 172, 

 t. 26, f. 1. L. farinosa subsp. Dilleniana Cromb. liich. Bx'it. 



