LICHINA.] LTCHINEI. 33 



Hab. On intertidal rocks, and on those which are only washed by 

 the spray of the sea, in maritime districts. Distr. General and very 

 abundant where it occurs on most of the rocky coasts of the Channel 

 Islands, Great Britain, and Ireland; more frequent on the N.E. of 

 Scotland. B. M. : Islands of Jersey, Guernsey, and Alderney. White- 

 sand Bay, Mount's Bay, near Anthony, Gerrans, Land's End, and Scilly 

 Islands, Cornwall ; Tenby, Pembrokeshire ; Southerndown, Glamorgan- 

 shire ; Barmouth, Merionethshire ; Puffin Island, Anglesea ; Port Soderick, 

 Isle of Man; Morecambe Bay, Westmoreland; St. Bees, Cumberland. 

 Portletheu, Kincardineshire ; Island of Mull and Loch Creran, Argyle- 

 shire. Kenmare, co. Kerry ; coast of Connemara, co. Galway ; Bally- 

 castle, co. Antrim. 



9. LICHINIZA Nyl. Flora, 1881, p. 6. Thallus minutely 

 squamulose, squamules adnate, difform, chestnut-brown, with pro- 

 minent darker globules or subglobose papillae; gonimia sordid- 

 yellowish, radiately arranged in the thaUine globules in mouili- 

 form series. Apothecia lecanoriiie ?, terminal. Spermogones not 

 seen. 



Though differing in external appearance from the preceding genus, 

 this nearly agrees with it in texture. This, however, as observed by 

 Nylander, is cellular, thinner, and more irregular, while the gonimia 

 are differently coloured. Its true place, in the absence of rightly developed 

 apothecia and of the spermogones, is rather uncertain, though it is most 

 probably allied to Lichina. 



1. L. Kenmorensis Nyl. Flora, 1881, p. 6. Apothecia minute, 

 terminal on and concolorous with the thalline globules, lecanorine ? ; 

 " spores 8nae, ellipsoid, simple, colourless." Cromb. Grevillea, x. 

 p. 22.Synalissa Kenmorensis Holl, MS. (1872). 



The thallus is effuse and apparently widely spreading. In the speci- 

 mens seen by me only a single young apotheciura was visible, similar in 

 external appearance to the young ' apothecia of Lichina. Dr. Holl 

 informed me that the spores were seen by him in a better-fruited spe- 

 cimen, though not well developed. 



Hab. On moist mica-schist boulders in upland mountainous situa- 

 tions. Distr. Very local and rare, having been found only in one 

 locality in the S. Grampians. B. M. : Shores of Loch Tay, Kenmore, 

 Perthshire. 



10. PTERYGIUM Nyl. Bull. Soc. Bot, i. (1854) p. 328 ; Syn. 

 i. p. 92 ; Lich. Scand. p. 24. Thallus appressed, thinly divided, 

 radiate at the circumference, polished in section ; gonimia 

 often moniliformly concrete, arranged chiefly under the cortical 

 layer ; thin section of thallus bluish on the lower side. Apo- 

 thecia lecideine ; spores 8nae, ellipsoid or oviform, septate, colour- 

 less ; hymenial gelatine, especially the thecae, bluish with iodine. 

 Spermogones with long jointed sterigmata and straight spermatia. 



