CRYPTOGAMIA. ALGAE. 1938. Lichen. ^45 



3. fulfills. Dirty white, with a greyifh rugged circumfcription: fhields 



.minute, much crowded, fiexuous. nearly fimple, pruinous. 



"fcriplus. MmnbranaceonsV -poKmed, ^w.Hitte bordered with 



black : fhields nuked, glabrous, linear, fiexuous, fimple and 



branched. Hoffm t. 3./' 1. b,- 



2. macrocarpus. Dirty White, effufe:. ihiclds very long, fbaight, nearly 



parallel, fimple and forked *t. top, ¥e*L t i.f. i.a, b. 

 3- bebrahut, Dull grey, effufe: fhields Straight, curved and .branched at 

 right angle?, ■ ^. f. 2 a. 



JentrUlcus. Tartareousf, dbtenjMrisd, pure white, fomewhat mealy ; 

 fhields depreiTed,, naked, exquiiitely branched; divergent blanches 

 and branchlets forked. Achar\ /. 1. /'. 10. 



2. Shields or tubercles feffile, hardijh, orbicular or deformed by mutual 

 -prejj'uc; their dish flattifh or becoming convex, often with a thichifi 



margin , nearly the colour cf the dish frond crustaceous, foliaceous, 

 Jledate, or uvibilicnte . Lecifdea. 



A. Frond cm flaceous, an form, Catillaria, 

 *Mufcorum. Wiutifh, thin, fome-vhat meaiy: Shields flat, margined, 



black, becoming hernifphasrical, confluent, Eng, Bot t 626. 

 *immcrfus. Greyifh- white, fmcoth: fhields immerfed, margined, 



black, becoming convex and deciduous. Eng. Bot, i. 193. 

 dryinus. White, leprous, fomewhat mealy; fhields black, fomewhat 



globular, becoming dilated, margined, r.pprefTed, at lafl rugged 



and irreguk' . 

 lil acinus. Pale greyiih lilac, thin, determined, with a finuate 



circumference, edged with black: flijelds minute: black, fomewhat 



globular, becoming flattifh, margined, deprefTed. 

 *parasemus. Greyiih, thin, uninterrupted, edged with black : fhields 



black, flattifh, margined, becoming; convex. Eng.. Bot. 1450. 

 * 2. Eltfochroma. Pale green, limited, granular, cracked; fhields black, 



margined, becoming convex. Eng. Eot.t, 1451. 



3. punctata. Greyifh -white, rather cf'uie: fhields minute, black, plano- 

 convex, rarely featured. 



4. airofangutheus. Cm It hardly any: (hields minute, black'-fanguineous, 

 vvuh a bkek bolder . 



5. Athrous, Grey, unequal, rugged: fhiel'ds black, crowed, raifed a 

 little convex', at length fuiVountLe'd by an accefiary margin from thecruft. 



font ops. Granular, iinbqtial', whitifli grey edged 'with black: granu- 

 lations deformed, fomewhat lobed; fhields black, margined, fu- 

 perficial, fiat'. 



*betr<zus. Oibicular, equal, thin, whitifh, very finely cracked in a 

 fomewhat radiate manner; fhields black, flattifh, in concentric 

 circles. Eng Bot. t. 246. 



2. excentricut, Thin, white, with a fine black edge, and decufiate with 



ferpentinc lines: fhields irregularly fcattered. 



3. calltjleus. Greyifh-blue, fomewhat limited: fhields minute, crowded, 

 deprefTed, at length raifed. 



VOL. VI.— Q.5 



