CRYfTOGAMIA. ALGAE. 1938. Lichen. 1745 
Dirty white, with a greyifh rugged circumfcription: fiiields 
much crowded, fiexuous. nearly limple, pruinous. 
M ttnbranaceotis, polifhed, greenilh-white bordered with 
, : fhields naked, glabrous, linear, flexuous, fimple and 
6. f- 3-/ 2. b. 
white, effufe: (hields very long, ftiaight, nearly 
}- limple and forked at top. Rer,. t. x.f, i. a, b, 
j ri Dull grey, effufe: /hields llraighc, curved and branched at 
angles. H.ffm. i. 3. /. 2. 
"^^‘■fnrcons, determined, pure white, fomewhat mealy : 
3 f ^^‘^^■prefled, naked, exqnifitely branched; divergent branches 
^•Ski forked. Achar. t. l- f- >0. 
Pr^Cr^ harclijh, orbicular or deformed by mutual 
diskflattifb or becoming convex, often with a thickijh 
'^‘o.rly the colour of the disk: frond crustaceans, foliaceous, 
or umbilicate. Lecidea. 
Frond cruflaceous, uniform- Caiillaria. 
'■ *^'ack^^^L thin, fomewhat mealy: Ihields flat, margined, 
i:fus 
becoming hemifphxrical, confluent. Eng. Bot t. 626. 
b!a"u' Gfi^yilh-white, fmooih: Ihields immerfed, margined, 
becoming convex and deciduous. Eng. Bot. 193. 
g|A White, leprous, fomewhat mealy; (hields black, fomewhat 
aj, > becoming dilated, margined, ap p re (Ted, at laft rugged 
"•regular. 
f’ale greyifh lilac, thin, determined, with a finuate 
Pl l^’^berence, edged with black:(hictds minute: black, fomewhat 
§b)bui 
^r, becoming flattilh, margined, deprefled, 
Greyifh, thin, uninterrupted, edged with black ; (hields 
*2, flattifh, margined, becoming convex. Eng. Bot. 1450. 
itijr f Pale green, limited, granular, cracked ; (hields black, 
^®™rning convex. Eng. Bot. t. 
Cq 3 “ras. Greyiih white, rather eifule; Ihields minute, black, plano- 
f' rarely fcattered. 
Wx-x^^Suineus. Cruft hardly any: (hields minute, black-fanguincous, 
S- 4; border. . 
r, .httie 1 Grey, unequal, rugged: (hields black, crowed, raifeda 
'’’‘‘^Ps. at length furrounded by an acceflary margin from the cruft, 
lat-Q '^'^^riular, unequal, whitifh-grey edged with black: granu- 
Perfi ? rleformed, fomewhat lobed; ihields black, margined, fu- 
flat. 
fotj,* prbicular; equal, thin, whitifh, very finely cracked in a 
- f^'kat radiate manner; (hields black, fiattilh, in concentric 
•ce«, ■ Bot. t. 246. 
^teus. Thin, white, with a fine black edge, and deculTate with 
?. >les. 
^*fpenti 
lines; (hields iriegularly fcattered. 
^'PreSr' Greyiih-blue, fomewhat limited: Ihields minute, crowded, 
lsd> at length raifed. 
VOL. VI 
