1768 CRYPTOGAMIA. ALGjE. 1938. Lichen. 
* Hypnorum. Green-brown, imbricate ; lobes irregularly ciit> 
a granular- mealy margin ; ftields fcattered, flat, dull 
with ai^entire margin the colour of the criifl. 
hpidorus. 
fouS< 
gin the colour of the cruft. Hoffm. t. 63 /i 4 — 7. 
*lrunneus% Green-brown, imbricate, in crenate granular 
fhields crowded, flattifti, rufous, with a thin crenulate rnarg'*’ 
colour of the cruft, Eng. Bat /. 1240. ,vi!! 
2. ntbulofus. Greyifh, imbricate, grarular-lobed: fhielda blackilb'^^*^ 
with a crinulate grey margin. Hoffm. t. f. x, 
3. coronatu!. Grey, granular: fhields minute, fcattered, depreffed, 
j becoming convex, with a granular grey margin. Hoffm, t. '* 
*candelarius. Yellow-green, imbricate; lobes minute, much cro"^ 
jagged, granular; fhields flat, margined, yellow-green. 
£>///. M 8./. 18. B, y 
•c. polycarpus. Yell«wilh, fomcwhat imbricate, with crowded jagS^“ 
Ihieldsmuch crowded, covering the frond, margined, yellowilb. y 
3. lychsuus. Dull yellow, fruftular-puifed, granular ; (hields apP'^ 
convex, glabrous, barely margined, orange-yellow, y 
grifeus. Greyifh, granular-leafy: Ihields black, becoming 
with a crenulate greyifh border. 
Jimilaris. Whitifh, fruftuiar, foinewhat imbricate ; lobes agg^®* 
convex: fhields margined, whitifh. 
c. Frond crujiacetus^ flato with a lobed or radiate circamp^^' 
Placodium. .fcf 
*geUdus. Tartareous, cracked, orbicular, radiately-Iobed, 
white, with a brown radiate central wart; fhields fcattC^ ’ 
with a thick entire grey-white margin. Eng. Bot. t. (> 99 ' 
*drcinatus, Tartareous, orbicular, radiately plaited, crackedr y 
cous-grey: Ihields central, much crowded, flat, blackilh,P. j, 
ing angular, with a very thin grey margin. Hoffm. t. 
alphoplacus. Tartareous and fomewhat cartilaginous. 
radiately plaited in fhort nearly cylindrical fegmen's* ruK' 
rugged, greyifh-white : fhields central, flat, blueifh" 
with a thin entire greyifh-white margin becoming flight 5 ^ jjii^ _ 
fufeatus. Tartareous, warty-cracked, olive-brown, radiately 
fliields crowded, flattifti, bay, becoming a little convex ^ 
lar, with a raifed olive-brown margin. Hoffm. /. 
2. myrrhhms. Cracked, lead-grey, radiately plaitedrlhields deprffl'' ' 
contiguous. olS'’k' 
meJybdtnus. Tartareous, orbicular, deeply cracked, radiately rj^iy 
umbre-brown, with narrow terminal fegments: fhiel“*^[,i(;*'^ 
brown, deep, with a (lightly infle£led tumid 
margin- 
