of Edinburgh, Session 1881-82. 
465 
thecium inf ere late fuscnm ; sporae 12 /x longae, 6 /x latae. — Ad saxa 
quartzosa : B.C.S. 
Buellia substigmatea, Mull. Arg. : thallus tenuissimus, con- 
tinuus, levis, olivaceo-virens, demum subrimoso-areolatus ; apothecia 
arete sessilia, J mm. lata, plana, prominenter marginata, nigra ; 
epithecium fuscnm, lamina liyalina, hypothecium hyalino-subfuscum; 
sporae octonae, 10-13 g longae, 7-8 g latae. — Ad saxa granitica : 
B.C.S. 
Bueltja substigmatea, Mull. Arg, v. obfuscata, Mull. Arg. : 
thallus magis distincte rimoso-areolatus et olivaceo-fuscus. — Ibidem : 
B.C.S. 
Buellia innata, Mull. Arg. : thallus tenuiter tartareus, argillaceo- 
albidus, continuus, mox quoad partem superficialem rimoso-areolatus, 
areolae contiguae, planae, leves, opacae ; apothecia immersa, atra, 
obsolete nigro-marginata, evoluta J-f mm. lata, discus leviter con- 
cavus; epithecium et hypothecium atro-fusca, lamina hyalina; sporae 
9-10 /x longae, 5J-6J /x latae. — Ad saxa granitica : Schweinf. 
GRAPHIDEAl 
Dirina cinerea, Mull. Arg. : thallus cinereus v. flavescenti- 
cinereus, madefactus virens, intus argillaceo-pallidus et e flavescente 
et cinnabarino variegatus ; apothecia et sporae ut in D. repanda , 
sed margo tenuior demum que subaurantiacus. — Calicicola : B.C.S. 
Dirina cinerea, Mull. Arg. f. sorediosa : thallus sorediis circ. 
1 mm. latis demum granuloso-efflorescentibus ornatus. — Cum planta 
genuina speciei : B.C.S. 
Dirina immersa, Mull. Arg. : thallus tartareus, tenuis, levis et 
continuus v. demum obsolete rimulosus, coerulescenti-cinereus v. 
incanus ; apothecia immersa et prominentia thallina circulari cincta, 
1| mm lata, demum vix distincte emergeiitia, discus planus, cinereo- 
pruinosus ; sporae octonae, 18-19 /x longae, 6-8 g lata 1 ,, 4-loculares. — 
Calcicola : B.C.S. 
