REV. J. M. CROMEIK ON NEW BRITISH LICHENS. 487 



elliptical, simple, -OOg-OlS millim. long, '0045--0055 millim. thick: 

 paraphyses not discrete : thalamium with the epithecium bluish, 

 hypothecium colourless or vaguely reddish below : hymeneal gelatine 

 blue, and then violet-red with iodine. ^ 



On calcareous rocks of Craig Guie, near Crathie church, in 

 Braemar, August 1868. Apparently rare, and gathered only very 

 sparingly beside the limestone quarry. It is allied to Z. aphana^ 

 Nyl., a species found in Ireland by Mr. Carroll, botli, with tlie 

 following, belonging to the group oi L.furvella^ ]S"yl. 



17. Lecidea melaphana, Nyl.in Flora, 1869, p. 83. Thallus black, 

 thin, opaque, unequal, somewhat difFractate : apothecia black, small, 

 convex, immarginate, obscure within : spores eight in thecse, colour- 

 less, oblong, simple, •011-'019 millim. long, 'OOIS-'OOSS millim. 

 thick : paraphyses not discrete, epithecium with upper portion of 

 thalamium blue, hypothecium slightly brownish below : hymeneal ge- 

 latine blue with iodine, and then partly of a violet colour. 



On schistose boulders of Craig Guie, inBraemar, August 1868. 

 Like the preceding, to which it is closely allied, this species oc- 

 curred, but in very small quantity, amongst the boulders which lie 

 thickly scattered on the lower slope of the hill, westward from the 

 quarry. 



18, Lecidea inserena, NyL in Flora, 1869, p. 84, Thallus ob- 

 scurely greyish, rimose-areolate ; the hypothallus black, visible, or 

 denudate : apothecia somewhat tumid, black within, paraphyses not 

 discrete, epithecium bluish brown, hypothecium with white opaque 

 stratum beneath : spores eight in thecse, ellipsoid-oblong, -OH-'Ol 7 



006 



iodine. 



On calcareous rocks of Craig Guie in Bra^mar, August 1868. 

 Very rare. 



group 



irosa, Plot., occurs also very sparingly on Morrone, according to 

 a small scrap in my herbarium, which was gathered there in 1861, 

 but not then correctly named. 



19. Lecidea postuma. Ay/, in Flm-a, 1868, p. 345. Thallus greyish, 

 thin, scattered, evanescent : apothecia black, minute, plane, margined, 

 concolorous within: spores 6-8 in thecse, colourless or brownish, 

 elHptical oblong, 3-septate (often with the addition of oblique or lon- 

 gitudinal septules), -OlS-Oie miUim. long, 006-007 milhm. thick: 

 tpithecium brownish : hymeneal gelatine deep blue with iodine. 



On calcareous stones in gravelly places, near the summit of 

 Morrone, in Braemar, July 18G5. Probably not very rare, though 



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