i 7 68 CRYPTOGAMIA. ALGJE. 1938. Lichen. 



* Hypnoriun. Green-brown,- imbricate ; lobes irregularly cut, with 

 a granular- mealy margin : fhields fcattered, fiat, dull rufous, 

 with an entire margin the Colour of the cruft. E. Bot. J4.0P 



lepidorus. Pale yellowifh, forh'ewhat imbricate, granular-lobed: lobes 

 roundifh, rather diftincl, crenate, afcending: fhields fcattered, 

 convex, becoming dilated, fiattifh, bay, with a crenate-fcaly mar- 

 gin the colour ot the cruft. Hoffm. t. 63 f. 4 — 7. 



*brunneus. Green-brown, imbrieute, ; in crenate granular lobes : 

 fhields crowded, fiattifh, rufous, with a thin crenulate margin the 

 colour of the cruft. En g. Bot t. 1-240- 



2. vebulofus- Grey i fli, imbricate, grand ar-lobed; fhields blackifh-brown, 

 with a crenulate grey margin. Hoffm t. 40 f. i, 



3, coronatus. Grev, granular: fhields minute, fcattered, depreffed, reddifh, 

 becoming convex, with a granular grey margin. Hoffm. t. 56./*. I. 



*candelarius. Yellow-green, imbricate; lobes minute, much crowded, 

 jagged, ^ranuiar; fhields flat, margined, yellow-green. 

 DUJ.t.tS:/. 18. B, 



2. polycarpus. Yellowifh, fomewhat imbricate, with crowded jagged lohess 

 fhields much crowded, covering the frond, margined, yellowilh. 



3. lycbneus. Dull yellow, fruftufar- puffed, granular ; fhields appreiTed, 

 convex, glabrous, barely margined, or.mge-yellow. 



grifeus. Greyifh, granular-leafy: lhields black, becoming convex, 



with a crenulate greyifh border. 

 Jimilaris. Whitifh, fruftu.'ar, fomewhat imbricate ; lobes aggregate, 



convex: fhields margined, whitifh. 



c. Frond cruflaceousy flat, with a lobed or radiate circumference. 



Piacodium. 



*geh'dus. Tartareous, cracked, orbicular, radiately-lobed, grey- 

 white, with a brown radiate central wart; fhields fcattered, red, 

 with a thick entire grey- white margin. Eng. Bot. t. 699. 



*circinatus y Tartareous, orbicular, radiately plaited, cracked, glau- 

 cous-grey: fhields central, much crowded, flat, bbckiih, becom- 

 ing angular, with a very thin grey margin. Hoffm. t. 4./'. 5, 



tlphoplacus. Tartareous and fomewhat cartilaginous, orbicular 

 radiately plaited in fhort nearly cylindrical fegments, warty' 

 rugged, greyifh-white : fhields centra!, flat, blueifh-rufous' 

 with a thin entire greyiih -white margin becoming ilightly lobed' 



fufcatus. Tartareous, warty -cracked, olive-brown, radiately plaited: 

 fhields crowded, fiattifh, bay, becoming a little convex and angu- 

 lar, with a raifed olive-brown margin. Lloffm. t 51./*. 2. 

 2. myrrhinus. Cracked, lead-grey, radiately plaited :fhields deprefled, black 

 contiguous. 



tnolybdinus, Tartareous, orbicular, deeply cracked, radiately plaited, 

 umbrc-brown, with narrow terminal fegments: fhields black- 

 brown, oeep, with a flightly inflected tumid umbra-brow or 

 margin. 



