CRYPTOGAMIA ALG^E. 263 



3. C. vulgaris, very green, widely spreading, the granules 

 densely crowded, rounded, adhering together by fours. Chlorococ- 

 cum vulgare, GREV. Crypt. Fl. t. 262. Lepraria botryoides, HOOK. 

 Scot. ii. 73. 



Hab. Common on wood in moist places, which it covers 

 with a very thin green coating, easily rubbed off, and 

 staining the fingers. 



4. C. cruenta, in diffuse irregular gelatinous purple spots, com- 

 posed entirely of granules compacted together. SPRENG. iv. 373. 

 Tremella cruenta, Eng. Bot. t. 1800. Palmetto, cruenta, GREV. 

 Crypt. FL t. 205. 



Hab. Common about the lower parts of walls in damp 

 situations in Berwick and Tweedmouth, during the 

 wet wintry months. 



This " forms broad indeterminate patches, of a deep rich 

 purple, with a shining surface, as n blood or red wine had 

 been poured over the stone or ground." During dry 

 weather it contracts, grows dull, and disappears, but after 

 rain spreads again, resumes its sanguine colour, and be- 

 comes conspicuous even to vulgar gaze. Its history affords 

 an easy explanation of a phenomenon considered super- 

 natural by the monkish chroniclers. " In the plain near 

 Hastings, where the Norman WILLIAM, after his victory, 

 found King HAROLD slain, he built Battle-Abbey, which 

 at last (as divers other monasteries) grew to a town enough 

 populous. Thereabout is a place which after rain always 

 looks red, which some have attributed to a very bloody 

 sweat of the earth, as crying to heaven for revenge of so 

 great a slaughter." Notes to DRAYTON'S Poly-olbion. 



5. C. rupestris, irregular, thickish, gelatinous, dirty yellow, or 

 sometimes orange-yellow ; surface very uneven ; granules mi- 

 nute, globular SPRENG. iv. 373. Palmella rupestris, LYNGE. 

 Hydroph. Dan. 207. t. 69. 



Hab. On rocks over which water drips, frequent in this 

 neighbourhood. On the rocks at the calcareous spring 

 below Twizel-castle, Rev. A. Baird. On sandstone 

 rocks below Marshall meadows. 



Forms wide irregular patches, varying in colour from a dull 

 dirty yellow to a reddish-orange, the drier the situation 

 the deeper the colour. The interior is white. The gra- 



