2Sf) LICHEXACEI. [jfEPHROMUM. 



Applecross, Ro^.^-shire. Fairhead, co. Antrim ; Luggelaw, co. Wicklow ; 

 Killarney, co. Kerry ; Derryclare, Cuuiiemara, co. Galway. 



Form panniforme Cromb. Grevillea, xv. (1887) p. 77. — Thallus 

 lobulato-disseoted, closely imbricate, the lobules small, crowded, 

 beneath dark-brown. Apothecia small. 



Has the appearance of other panniform conditions of foliaceous lichens. 

 The apothecia, which iu the specimens seen are with one exception very 

 sparinuflv present, are small and confined to the larger lobules. 



Hah. On the mossy trunks of trees, and on b nulders in maritime and 

 upland district?. — Distr. Lo^al and scarce in S.AV. England and the W. 

 Hiirhlands of Scotland. — B. .M. : Near Penzance, Cornwall. Barcaldine, 

 Argyleshire ; Glen Lochay, Perthshire ; by Loch Linnhe, Inverness-shire. 



/3. Hlbernicum Xyl. ex Leight. Lich. Fl. ed. 3 (1879) p. 100.— 

 Thallus with the medulla white (K + purplish). Apothecia with the 

 back of the receptacle smootbisli. Otherwise as in the type. 



A very distinct variety, if not subspecies, characterized by the white 

 or whitish medulla, in which respect it resembles A'. Iceoigatum. The 

 chemical reaction, however, shows it to belong to N. lusitanicum. In the 

 specimens seen the apothecia have the back of the receptacle smooth or 

 subsmooth : though as this occurs also in younger and muscicole states of 

 the t\-pe, it can scarcely be regarded as of diagnostic value. 



Hah. On the trunks of old trees among mosses on rocks in maritime 

 tracts. — Distr. Local and scarce in "W. England, the W. Highlands of 

 Scotland, and N.W. Ireland. — B. M. : Xear Walkiugham, Devonshire; 

 Launceston, Cornwall ; near Douglas, Isle of Man. Barcaldine, Argyle- 

 shire; by Loch Linnhe, Inverness-shire. DoughbruaghMts., cu. Galway. 



52. PELTIGERA Hoffm. Deutsch. Fl. ii. (1795) p. 106 pro parte; 

 Nvl. emend. Flora, 18G6, p. IIG. — 

 Thallus fragile, opacpie or somewhat 

 shining, the cortical layer not conti- 

 nuous on the under surface, which is 

 generally nerved ; gonidial layer 

 composed of gonimia. Apothecia 

 adnate on the front margin of the 

 tlialline lobules, ascending or hori- 

 zontal; spores (0-)8iia?, 3- or pluri- 

 septate, fusiform, colourless ; hyme- 

 nial gelatine bluish with iodine. 

 Spermogones not known. 



As previously observed, this is well 

 separated from Peltidea, by the goni- Pelfigera canina. Hoffm. — a. A syn- 

 miose and ecephalodiiferous thallus. goniinium, x350. b. Free gov.i- 

 From the preceding it is distinguished uiia,x;i50. c. Spores, x.)UO. 

 bv the cortical layer not being conti- 

 nuous beneath, and by the position of the apothecia. The rhizinae also, 

 when present, are composed of fasciculate filaments. All the Kurop.^an 

 ispecies occur in our Islands, and for the most part in considerable quantity. 



Fis. 5L 



