LECANORA.] LECANO-LECIDEEI, 471 



Che.^il Beach, Portland Island, Dorsetshire ; Lynd hurst Mr.or, Hants ; 

 Thetford Warren, Norfolk; Hereford JJeucon, Malvern, Worcestershire; 

 Crossf.ien, ^lonnioiithsliire ; Caer Caradoc and Longuiynd, Shropshire ; 

 Kglestone, Durham. Appin, Arfryleshire. 



^'ar. ,). zonata W.dnio, Mcdd. Soc. pro F. et Fl. Fcnn. t. vi. (1881) 

 p. 1(58. — Thallus determinate, thinly rimoso-arcolate, greyish 

 glaucous, effigurate at the circumference with concentric and 

 parallel paler lines and limited by a very thin, black hypothallus. 

 Ai)othecia as in the type. — Cronib. Grevillea, xix. p. 57. — tScu/nlia 

 zonata Ach. Yet. Ak. Handl. (IbUO) p. 105 ; Lich. Univ. p. ^29. 



A distinct variety, usually overlooked by authors, but well charac- 

 terized by the thallus being more or less broadly zonjite at the circum- 

 ference. The lines -with which it is there marked are at times whitish, 

 as stated by Achaiius. but this ajiparently is the result of abrasion. A 

 young and less developed condition may be var. t'quamata (Fli.t.) Fr. fil. 

 Lich. Scaud. p. 270 (twn Leight. Lich. Fl. ed. 3, p. 194, which is only 

 the so-Ciilled iorax porinuidea hypothaliine). 



Hab. On siliceous stones in maritime and upland situations. — Distr. 

 Extremely local and scarce in S.E. England. — B. M. : Lydd Beach, 

 Kent ; South Downs, Sussex. 



Var. y. hisca Xyl. Pyr. Or. Obs, Xov. (1S91) p. 59 (nota 1).— 

 Thallus thinuish, rimoso-areolate, subrugulose, greyish or dark- 

 grey ; hypothallus little visible. Apothecia somewhat small, often 

 tlexuose; spoies 0,UlO-21 mm. long, 0,010-10 mm. thick. — 

 Leranora hisca Xyl. Flora, lS7;i, p. 09 (nota 1); Cromb. Journ. 

 Eot. 1^^2, p. 274 ; .subsp. htsca Cromb. Grevillea, xix. p. 57. 



Now viewed by Xylander as only a variety of L. gihbosa, difiering in 

 the characters given and more especially in the rather longer spermatia, 

 which are 0,010-21 mm. long, 0,010-14 mm. thick. In other respects it 

 approaches subspecies L. subdepvessa. The small apothecia are at times 

 numerous, crowded, and ditfbrm. 



Hab. On rocks in maritime and mountainous districts. — Distr. Only a 

 few localities in Great Britain and the Channel Islands. — B. M. : Chateau 

 Point, Isle of Sark. Breidden mt., Montgomery; Barmouth, Merioneth- 

 shire; near Newton, Cleveland, Yorkshire; Scale Hill, Lazonby, 

 Cumberland. Ben Lawers and Craig Calliach, Perthshire ; S. of Bay of 

 Nigg, Kincardineshire. 



Subsp. 1. L. depressa Xyl. Xot. SiiUsk. pro F. et Fl, Fenn. n. s. 

 V. (1806) p. 137. — ■Thallus effuse, arcolato-rimulose, greyish or 

 dark ; hypothallus indistinct. Apothecia somewhat smaU, subleci- 

 deine, at length plane ; spores 0,018-24 mm. long, 0,008-0,014 mm. 

 thick. — Cromb. Lich. Brit. p. 55 ; Leight. Lich. Fl. p. 210 pro parte, 

 ed. 3, p. 194 pro parte. — According to Th. M. Fries (Lich. Scand. 

 p. 282) this is not Sar/edia de^ji'tssa Ach. (Lich. Univ. p. 327, 

 t. 6. f. 3), which has thalline reaction K-|- and is a form of 

 L. cinerea. 



Well characterized as a subspecies by the type of the apothecia, which 



