64 LEOANO-LECIDEEI [lECIDEA 



This, as in other cases, is owing to the growth of young fruit upon 

 the old. 



Hab. On calcareous rocks in hilly and mountainous districts. — 

 Distr. Seen from only a few localities in W. and Central England, 

 N. Wales and the Grampians, Scotland. — B. M. T3athampton Downs, 

 Somerset ; Black Dale, near Buxton, Derbyshire ; Lyn Cae, Cader 

 Idris, Merioneth ; Cunswick Scar, Westmoreland ; Achosragan Hill, 

 Appin, Argyll ; Craig Tulloch, Blair Athole, Pertlishire ; Morrone, 

 Braemar, Aberdeenshire. 



107. L. subumbonella Lamy in Bull. Soc. Bot. Fr. xxx. p. 

 409 (1883). — Thallus effuse, thinnish, unequal, white, subopaque 

 (K — , CaCl — ). Apothecia minute or subminute, somewhat 

 plane, margined, umbonate in the centre, black, opaque, con- 

 colorous within ; pai-aphyses subcoherent, pale-brown at the 

 apices ; hypothecium thickish, brown ; spores oblong-ellipsoid, 

 0,016-22 mm. long, 0,007-9 mm. thick ; hymenial gelatine bluish, 

 the asci at length tawny-wine-red, with iodine.^ — L. suhumhonata 

 Nyl. in Flora lix. p. 236 (1876), non in Flora Iv. p. 358 (1872) ; 

 Cromb. in Grevillea v. p. 28 ; Leight. Lich. Fl. ed. 3, p. 306. 



The apothecia, frequent in the single specimen seen, often appear 

 as if divided into several hymenia. The spermogones, sparingly 

 present, have the spermatia cylindrical, or fusiform -cylindrical,. 

 0,004-7 mm. long, 0,0008 mm. thick. 



Hob. On mica-schist rocks in an upland situation. — B. M. Near 

 Letterfrack, Connemara, Gal way (the only locality). 



108. L. contortula Stirton in Scott.Nat. iv. p. 167 (1877).— 

 Thallus pale or leaden-grey, thickish, somewhat wrinkled, rimose- 

 areolate (K — , CaCl — ). Apothecia black, adnate, rather large, 

 plane or somewhat convex, umbonate or gy rose-plicate, with a 

 thick margin ; hypothecium brownish-black, brownish upwards, 

 paraphyses distinct, brown at the apices ; spores oblong or fusi- 

 form oblong, 0,015-21 mm. long, 0,006-75 mm. broad, hymenial 

 gelatine blue then wine-red with iodine. — Leight. Lich. Fl. ed. 3, 

 p. 307. Specimen not seen. 



Stirton remarks that this species is nearly' allied, if not identical, 

 with L. suhumhonata, but the larger apothecia and spores seem to 

 make it distinct. 



Hah. On rocks. Collected by Dr. Stirton near Salen, in Mull. Ps. 

 specimen in the British Museum, collected by W. Johnson at By well, 

 Northumberland, and labelled by him L. contortula^ has no visible 

 thallus, and the apothecia are not gyrose : but the spores and other 

 characters agree with the description given. 



109. L. consentiens Nyl. in Flora xlix. p. 371 (1866).— Thallus 

 whitish, smooth, subdeterminate, cracked-areolate, the areola? 

 plane or slightly convex (K — , CaCl — ), occasionally with pale- 

 or reddish-brown cephalodia (superficial granules enclosing blue- 

 green algae). Apothecia black or brownish-black, innate, con- 



