64 LECANO-IiBCIDEEI [lECIDEA. 



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

 the old. 



Hah. On calcareous rooks 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. Bathampton Downs, 

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

 Idris, Merioneth; Cunswick Scar, Westmorelaaid ; Aohosragan HUl, 

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

 Braemar, Aberdeenshire. 



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

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

 (K — , OaCl — ). Apothecia minute or submiaute, somewhat 

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

 colorous within ; paraphyses 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. subumhonata 

 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. 



nab. On mioa-sohist rooks in an upland situation. — B. M. Near 

 Letterfraok, Connemara, Galway (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 gyrose-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, 

 vnth L. subv/mbonata, but the larger apothecia and spores seem to 

 make it distinct. 



Hab. On rocks. Collected by Dr. Stirton near Salen, in Mull. A 

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

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

 thallus, and the apothecia are not gyrose ; but the spores and othei^ 

 characters agree with the description given. 



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

 whitish, smooth, subdeterminate, cracked-areolate, the areolae 

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

 or reddish-brown cephalodia (superficial granules enclosing blue- 

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



