1764 CRYPTOGAMIA. ALGAE. 1938. Lichen. 



2 umbilicatus Leprous, greyifh: fhields minute, white, umbilicate. 

 *Perellus. Tartareous, cracked, granular- varty, white : fhields 

 crowded, white, becoming flat, with a turgid marginal length 

 flexuous. Eng. Bo/, t. J27. Otxhull. 

 2. pallefiens. Granular," paliih-white; fhitJU fcattered wich a depreffe'd 



pale difkand white tumid border, Hojfm. t. 21 :f 2. a: f. 

 *3* upfajienfis. Very thin, pale glaucous white: ftiiclds pale yellowifh, with 

 arumid white border- Hojfm. t. 20. /' 2. 

 * Turneri. Leprous, mealy, gnceniih -white: fhields fie fh colour, 

 mealy, with an entire leprous greenifh white margin. 

 Eng. Bot. t. 857. 

 *tartareus. Tartareous, granular, unequal, greenHh -white: fliields 

 flat, tefiaceons, becoming a little convex and wrinkled, .with a 

 tumid white margin. Eng. Rot /. 156. 

 *2.frigidus. Pale glaucous-white, thin', becoming branched; branches 

 gibbous and fpinuloas : (hields tejfeceous, with a white' margiit, 

 48. Stock, st. 6 /. 2. 

 3* gonaiodes. Tufted, with divaricate twifted lobe-warty deformed folid 

 branches rounded and obtufe at top, white. 

 Hamatotnma. Tartareous, mealy, pale fulpbur: fhieids depreffed, 

 becoming convex and raifed, deep red, with a. me a y pale iulphur 

 margin. Hoffm. t. it./. 1. 

 *£0ccineus. Leprous, mealy, green-fulphur and yellowifh ; fhields 

 convex, raifed, fcarlet, with a mea'y margin. Eng. Bot 223. 



2. frondofm. Leprous, mealy, greenifh-yellow: fhields immcrfed, lai 



convex, irregular, fcarlet, with a mealv m?.rgin. Hoffm. t. 49 f. 1. 



3. porphyrins. Leprou?, mealy, whitifh, fhicids deep red, with an entire 



margin. Hoffm. t. $t.f. 1 



puniceus. Leprous, fmooth, very thin, white: Oiields a little promi- 

 nent, flat, fcarlet, with a {lightly crenate white margin. 



*fubfufcus. Very thin, contiguous, fmooth, greyifh-white: (hields 

 feflile, fcattered, rather convex, rufous-brown, with a very emird 

 tumid greyifh-white margin. Dill. 18 16. 



2. hrjontus. Smooth, fomewhat warty, pure white: fhields flat.grcy-brovwi, 

 mealy, with a white entire margin. 



3. fiexuofus. Grcy-whitifhu granular, uneven : fhields raifed* flattifh, pale 



rufous-brown, with a flightly inflected irregular mealy margin. 



4. tumidu/ifs. Smooth, grey-white: fnields crowded, tumid, pale brawn, - 

 with & thickifh white margin. 



5. difidns. Thin: unequal, determined, black iih-g»ey, with a greyifh- 

 whiteed'ge: 'fliields flat, pale, with a nifed greyifh margin; at length 

 brovvnifh-ydlow, a little convex, and the margin flexsous. 



6. p'alli'dus* Thin, palifh-white: fhields pale and difcolouved, becoming 

 pale reddiuVbrowri, much crowded, angular, with a whitifh margin. 



7. argent ejus. Thin, nearly orbicular, quite fmooth, white: fhields deep 

 redtiifh-brown, with a whitifh tumid margin. 



3. poiUus.'Fh.m, -uneven, greyifh: fhields much crowded, irregular, angular, 

 black. brown, withawhite margin. 



