112 LECANO-LECIDEEI [bIATORINA 



Intimately related to the preceding, for states of ■srhich it might 

 readily be taien ; it differs, however, chiefly in the more constantly 

 and densely pruinose thaUus, the more persistently margined apothecia, 

 and the paler hypothecinm. The apothecia, not mrmerons in our 

 specimens, become in age angulose with the margin flexuose. 



Hab. Incmsting mosses on calcareoiis rocks and on soil in their 

 crevices in hilly and mountainous tracts. — Distr. Only a very few 

 localities in England and Wales and on the S. Grampians, Scotland. 

 — B. M. Torquay, Devon ; Cleeve TTill , Tatton, Somersetshire ; Ingle- 

 borough, Yorkshire ; Great Orme's Head, Carnarvonshire ; Isle of Man ; 

 summit of Craig CaUiach, Head of Loeh-na-Gat, and near the summit 

 of Ben Lawers, Perthshire. 



3. B. tninidnla A. L. Sm. — ThaHns subdeterminate, thicHsh, 

 vemicose- or areolat-e-squamulose, the areolae sublobate-plicate, 

 turgid, wrinkled or cracked on the surface, white or glaucous- 

 white (K— , CaCl— ). Apothecia moderate, sessUe on, the mar- 

 gins of the areolae, at first plane and thinly margined, then 

 convex and immarginate, often confluent, black, naked, black 

 within ; hypothecium thick, reddish-black ; spores oblong, in- 

 distinctly 1-septate 0,012 mm. long, 0,006 mm. thick; hymemal 

 gelatine bluish with iodine. — Lichen tumidulus Sm. in Trans. 

 Linn. Soc. i. p. 82, t. 4, f. 3 (1791). L. mamillaris Gonan Herb. 

 Montp. p. 88 (1796). Lecidea maviillaris Duf. in Fr. Lich. Eur. 

 p. 285 (1831) ; CarroU in Joum. Bot. iii. p. 290 (1865) ; Cromb. 

 lich. Brit. p. 77; Leight. lich. M. p. 254; ed. 3, p. 245. 

 ThalUndima mamillare Massal. Ric. lich. p. 96, fig. 198 (1852) ; 

 Mudd Man. p. 170. 



Well characterized by the superficially wrinkled or subgyrose 

 thaUus. The squamules, usually crowded, are at times somewhat 

 scattered ; the spores are obscurely bUocular. 



Sab. On the soil in crevices of sandy and calcareous rocks in 

 maritime and upland districts. — Distr. Very local and scarce in S.W. 

 and (Jide Leighton) in central England (Dovedale, Derbyshire). — 

 B. M. Babbieombe and Torquay, Devon; Cleeve TTill , Tatton, 

 Somerset. 



4. B. cumulata Th. Fr. lich. Arct. p. 187 (I860).— Thallus 

 eflfuse, thickish, unequal, warted or squamulose, the squamules 

 small, crenate-lobed or radiating at the circumference, greyish 

 (K-fyeUow, CaCl— ); hypothaUus black. Apothecia minute, 

 plane, crowded, black or reddish-black, with a thin paler margin, 

 at length evanescent; hjrpothecium pale-brownish, narrow, red- 

 dish-coloured in a thick section ; paraphyses coherent, rather 

 thickened and brown towards the apices ; spores oblong or 

 fusiform, usually 1-septate, sometimes simple or faintly 2-3-septate, 

 0,013-18 mm. long, 0,004-6 mm. thick ; hjrmenial gelatine bluish 

 then sordid-wine-red with iodine. — Lecidea cumulata Sommerf. 

 Suppl. Fl. Lapp. p. 157 (1826). L. conglomerata Cromb. in 

 Grevillea xxii. p. 59 (non Ach.). 



