CALICIUM.] CALICIEI. 89 



citrine colour of the capitulum is sometimes confined to the margin, and 

 in the herbarium is frequently obliterated. 



Sab. On the trunks of old trees in maritime and upland tracts. Distr. 

 Very local and scarce in S., E., and N. W. England. B. M. : Bury, Suffolk ; 

 Wheatfield Park, Oxfordshire; Esher, Surrey ; Bolney, Sussex; New 

 Forest, Hants ; Kempsey, Worcestershire ; Brantsdale and Bousdale Gill, 

 Cleveland ; Levens, Westmoreland. 



5. C. arenarium Nyl. ex Lamy, Bull. Soc. Bot. Fr. t. xxv. (1876) 

 p 345. Thallus none proper. Apothecia parasitic, somewhat 

 small; and scattered, stipes more or less elongate, stout, rusty- 

 brown, yellowish-suffused ; capitulum globoso-lentiform ; spores 

 oblong, simple or faintly 1-septate, 0,006-11 mm. long, 0,0025- 

 35mm. thick. Cronib. Grevillea, xv. p. 14. Cyphelium arenarium 

 Hampe in Mass. Miscell. (1856; p. 20. Coniocybe citrina Leight. 

 Ann. & Mag. Nat. Hist. ser. 2, xix. (1857) p. 130, t. 8. ff. 7-9. 

 Cyphelium citrinum. Mudd,Man. p. 261. Calicium citrinum Cromb. 

 Lich. Brit. p. 12 ; Leight. Lich. Fl. p. 45, ed. 3, p. 44. Brit. Exs. : 

 Leight. n. 269. 



The colour and general aspect of the fructification as well as the sterile 

 thallus of the host give this species the appearance of a state of Conio- 

 cybe furfuracea. The spores are not fully developed in specimens growing 

 in shady places. 



Hob. Parasitic on the thallus of Lecidca h/cidaon stones in shady walls 

 in upland districts. Distr. Rather local and scarce, having been gathered 

 only sparingly in Wales, N. England, and the Central Highlands, Scot- 

 land. B. M. : Croesfaen, Monmouthshire ; between Corwen and Bala, 

 Merionethshire ; near Dent, Yorkshire. Blair Athole, Perthshire. 



6. C. melanophseum Ach. Yet. Ak. Handl. (1816) p. 276, t. 8. f. 8. 

 Thallus thickish, granulose, yellowish- white or cream-coloured 

 (K + red), sometimes nearly obsolete. Apothecia moderate, scattered ; 

 stipes moderate or somewhat long, stout, black; capitulum turbinate, 

 black ; sporal mass occasionally protruded; spores 0,0025-0,008 mm. 

 in diameter. Miidd, Man. p. 259 ; Cromb. Lich. Brit. p. 12; Leight. 

 Lich. Fl. p. 42, ed. 3, p. 41. Brit. Exs. : Leight. n. 315. 



In general appearance this seems allied to C. trichiale, but the form of 

 the gonidia and the chemical reaction afford definite marks of distinction. 

 The apothecia are irregularly scattered and generally not numerous in 

 British specimens. 



Sab. On the trunks of old firs and decorticated oaks, rarely on decay- 

 ing posts in wooded upland tracts. Distr. Local and scarce in S., E., and 

 N. England ; very rare in Central Scotland. B. M. : Epping Forest, 

 Essex ; Leith Hill, Surrey ; Ardingley, Sussex ; New Forest, Hants ; 

 Oakley Park and Hailey Wood, near Cirencester, Gloucestershire ; Louns- 

 dale, Cleveland, Yorkshire. New Galloway, Kirkcudbrightshire ; Blair- 

 drummond, near Stirling, and Aberfeldy, Perthshire. 



Tar. /3. ferrugineum Schaer. Enum. (1850) p. 172. Thallus 

 granuloso-conglomerate or nearly leprose. Apothecia large, sessile, 

 the stipes immersed in the crust ; spores 0,004-11 mm. in diameter. 



