398 ticHENACEi. [LECANOBA. 



and N. Ireland. B. M. : La Coupe, Island of Jersey. Near Hasting, 

 Sussex. Portlethen, Kiucardineshire. Near Crookhaven, co. Cork ; 

 Doughruagh mt. and Dawros River, Connemara, co. Galway ; Ardglass, 

 co. Down. 



65. L. milvina Ach. Lich. TJniv. (1810) p. 358. Thallus effuse, 

 moderate or thickish, granuloso-areolate or areolato-diffract, verru- 

 culoso-unequal, brownish or brownish-black (K , CaCl ); hypo- 

 thallus thin, black. Apothecia minute, plane, crowded, brownish- 

 black, the thalline margin depressed, entire ; spores ellipsoid, 

 0,014-20 mm. long, 0,007-12 mm. thick. Borr. Eng. Bot. Suppl. 

 t. 2662. f. 1 ; Sm. Eng. Fl. v. p. 187 ; Mudd, Man. p. 144; Cromb. 

 Journ. Bot. 1874, p. 147 ; Leight. Lich. Fl. ed. 3, p. 216 pro parte. 

 Parmelia milvina Wahl. in Ach. Meth. Suppl. (1803) p. 34. 

 Brit. Exs. : Larb. Lich. Hb. n. 25. 



As observed by Acharius (Meth. I. c.), this is quite distinct from L. 

 sophodes in the darker, effuse thallus, the place of growth, and its general 

 aspect. It differs also in the rather larger spores, and, as it constantly 

 preserves its own type, may with propriety be regarded as a good species. 

 The apothecia are for the most part crowded and angulose. 



Hah- On rocks in maritime and upland districts. Distr. Local in the 

 Channel Islands, S.W. England, the S.W 7 . Highlands and N.E. Scotland, 

 as also in N.W. Ireland. B. M. : Vale Castle, Island of Guernsey. Near 

 Penzance, Cornwall. Barcaldine, Argyleshire ; S. of Bay of Nigg, Kin- 

 cardineshire. Maani Turk mts., co. Galway. 



66. L. atrocinerea Nyl. Lich. Par. (1854) n. 43; Flora, 1872, 

 p. 247. Thallus determinate, verrucoso- or granulato-areolate, 

 smooth, greyish- white or dark-grey (K + yellow, CaCl + reddish) ; 

 hypothallus black, persistent. Apothecia moderate, at first innate, 

 then sessile, plane or at length convex, dark-brown or blackish, the 

 thalline margin thin, subentire, at length obliterated ; spores 

 0,020-30 mm. long, 0,011-16 mm. thick. Cromb. Journ. Bot. 

 1870, p. 97 ; Leight. Lich. Fl. p. 226, ed. 3, p. 216. Rinodina 

 atrocinerea Mudd, Man. p. 144, t. 2. tig. 49. Lecidea atrocinerea 

 Sm. Eng. Fl. v. p. 174. Lichen atrocinereus Dicks. Crypt, fasc. iii. 

 (1793) p. 14, t. 9. fig. 2; With. Arr. iv. p. 19 ; Eng. Bot. t. 2096. 

 Lecanora milvina Tayl. in Mack. Fl. Hib. ii. p. 134 saltern pro maxima 

 parte. Brit. Exs. : Leight. n. 146. 



Not unlike L. confrayosa, from which it has generally not been rightly 

 discriminated. It differs, however, in the firmer, usually more continuous 

 thallus, in the constantly entire thalline margin of the apothecia, in the 

 larger spores, and more definitely in the thalline reaction with CaCl. In 

 younger plants the thallus is distinctly limited by a subpluinoso-radiating 

 hypothallus, and is then only subcontinuous. It is always well fertile, 

 the apothecia often becoming lecideoid. The spermogones are frequent, 

 with spermatia 0,007-9 mm. long, scarcely 0,002 mm. thick. 



Hub. On rocks in maritime and mountainous districts. Distr. Rather 

 local in the Channel Islands, S. and W. England, N. Wales, the S.W. 

 Highlands and N.E. Scotland, and in S. Ireland. B. M. : Island of 



