262 CRYPTOGAMIA-ALG.E. 



Hob. On stones in the beds of rivulets on moors ; and on 

 the front of dripping rocks by the sea-shore, covering 

 them for an inch or two in tuberculated patches. 



On the shore below Gunsgreen there occurs what I consider 

 to be a variety of this species. It covers, to a great ex- 

 tent, the bottom of rocky pools of brackish water at high- 

 water mark, with an uneven coating of a dirty yellow 

 colour, composed of wart-like tubercles adhering together. 

 The upper surface is somewhat lubricous and smooth, the 

 under uneven and green. It is fully T 2 oths of an inch 

 thick, fleshy ; a section exhibits 2 or 3 strata of green and 

 yellowish substance. The filaments are pellucid, nume- 

 rous, radiating and tapered, apparently unjointed, laciniate 

 at the apices. 



167. NOSTOC. 



1. N. commune, sessile, roundish, plaited, waved, olive-green. 

 TAUCH. Conf. 222. t. 16. f. 1. HOOK. Scot. ii. 74. Tremetta 

 Nostoc, LIGHTF. Scot. 898. Eng. Bot. t. 461. 



Hob. Spittal Links, and on sandy or gravelly ground in 

 many places, in spring and autumn, after rainy weather. 



" The ancient alchemists termed this vegetable the Flowers 

 of Heaven, and flattered themselves with the hopes of its 

 proving an universal menstruum !" " Infused in brandy, 

 it causes a disgust to that liquor in those who drink of it," 

 says a pharmacologist; and an excellent remedy, there- 

 fore, for the u Potatores summi." 



168. COCCOCHLORIS. 



1. C. protuberans, thick, irregularly lobed, very soft, green; 

 the granules elliptical SPRENG. Syst. Veg. iv. 373. Palmella 

 protuberans, GREV. Fl. JEdin. 323. ; Crypt. Fl t. 243. f. 1. 



Hob. On rocks covered with moss and lichens in heathy 

 deans, not rare in this neighbourhood. Aut. 



2. C. radicata, minute, globose, gelatinous, green, crowded and 

 in contact so as to form a crust spreading irregularly ; granules 

 elliptical. SPRENG. iv. 372. Palmella botryoides, GREV. Fl. Edin. 

 323. ; Crypt. Fl. t. 243. f. 2. 



Hob. On moist heathy banks amongst moss, frequent* 

 Aut. 



