JCRYPTOGAMIA. ALGAE. 1938. Lichen. 1763 



grumojns. Tartareous, granular-cracked, fomewhrt rr.calv, bliieifh- 

 grey: fhiVds a little imrrterfed, convex, b'ack; the margijl be- 

 coming wrinkly-whitifh. Hoffm. t 51. f. 1.2. 



fcoracinus Cracked, grey-black: fhields impreffed, flat, crowds.!, 

 black with a grey margin, becoming convex and the margin 

 evanefcent. Dicks t 9/. 2. 



tcoarftatus. Leprous, cracked, grey brown: fhields deprefled, black, 

 with a rnifed contracted pubefcent white margin. Eng. Bot. $34. 



elaciftus. liffufe, thin, hardly interrupted, uneven, grey: fhields mi- 

 nute, crowded, nearly globular, with a puncliform black flat difk, 

 and raj fed tumid white-mealy margin. Achar. t. 4./I 4. 



gncylaceus. Tartareous, cracked, glaucous-white, in fmooth f welling 

 patches: fhields rather immerfed, fiat^white-pruinous, becomin ; 

 convex and b'ack, with an accefTory white tumid margin at the 

 bafe. Aft- (tock .5./. 6./ 6. 



%JuIphureus. Tartareous, cracked, dull fulphur, in rugged and rather 

 tumid patches : fhields rather confluent, black brown, nicaiy, 

 with a paler margin at the bafe. Bng. Bot. t. 1 £ 86. 



fimpolitus. White, powdery, (lightly cracked: fhields rather im- 

 nvirfed, convex, deformed, grey-glaucous mealy, rufous inter- 

 nally and when tl)e mea'inefs is worn off. Eng Bot. /. 981. 



glaucoma. Tartareous, cracked, gFeyifh-white : fhields at fongtli 

 convex, deformed, glaucous, mealy, becoming blackifh, with a 

 flexuous grey- while margin. Hoffm- t. 52. 53. 

 *z. rimo/kt. White, cracked in round }fh- angular patches: fhields gUii- 



ccjw with a white .margin FL Dan. 468. 3, 

 *3» <varians WhiriOi, cracked: fhields black, poliihed, with a white mar- 

 gift: Linn. Trans 2 t % 2% f 3. 



Sivcrtzii. Determined, cracked, unequal, white, with a radiate 

 laci nine- branched circumference : fhields nearly globular, 

 glaucrui% mealy, becoming cluttered deformed and grey, with an 

 irr-guhr margin of the* fame colour. Aft. Stdck. 5. /. 6,f. 3. 

 a^gidojus. Thin, fruftular, unequal, greyifh-white: Jhields plano- 

 convex, pa'e grey and brownifh-glaucous, .mealy, becoming 

 nearly globular cindered and deformed, with a fubevanefeenc 

 margm. Jacq 3. t* 5./. 3. a. 

 Hageni- Thin, effufe, greyifh-white : fhields minute, .crowded, 

 g'aucous-hrown, mealy, with a white mealy margin. 

 Ha gen. tab. i.f 5. 

 z. fvriageus. Grey, fomewhat mealy: fhields minute, crowded, bromi, 

 fomewhat mealy, with a gJaucous-white crenulate-mealy margin. 

 cyanefcens. Leprous, thin, fmooth, whitifh : fhields flat, fomewhat 



flexuous, mealy, brown, with a tumid blue margin. 

 alheUus. Thin, uninterrupted, rather poliihed, milk-white: ftiiclJs 

 minute, fcattered, pale flefh-colour, with a white margin. 



S 52 



