i62 Dr. GooDENouGH and Mr. Woodward'j Obfervations on 



ftance, and becomes almoft cartilaginous; and in this ftate each 

 furface of the frond is frequently rough, with numerous round 

 fpines from half a line to a line in length, of which fome are bifid. 

 Some of thefe bear globular tubercles filled with feeds, and are cer- 

 tainly no other than the peduncles of thefe tubercles, though 

 many of them are abortive. This is Gmelin's hohfctaceus, t. 2, 

 though he does not appear to have feen the tubercles. 



The marginal cilia are always fimple ; fuch as appear otherwife 

 being in fa6l ligulce, about to form young branches ; thefe fome- 

 times, but rarely, bear tubercles. 



It adheres firmly to the rocks by its fibrous bafe, and when taken 

 out of the water is generally of a pale flelh colour, but, on being 

 expofed to the air, foon acquires a full red ; but fometimes it is 

 found of a bright red colour whilft in a growing ftate. 



The var. j2 which is defcribed by Mr. Lightfoot, differs in being 

 much narrower with almofl linear branches. It is alfo more 

 branched, and the branches are fometimes deflitute of ci/ia on their 

 margins. We have found it along with a, but much more rarely.. 



32. Fucus jUBATUs. Tab-. 17. Fig. 2. 



F . fronde membranacea ramosa ; ramis lanceolatis acutis, cilia- 

 tis, ciliis ramofis. 

 Habitat in rupibus et faxis fubmarinis apnd Ilfracombe in agro 

 Damnonienfi, copiose — In Infuia Portlandiae rarius. 



Mhceret rupibus callo minute — Fions a primo ortu furculofa fit 

 — quacunque furcuU faxa atringunt radicem agunt, et inde novae 

 fiunt plantiB, atque hae conferta: — Porro valde ramofa fit — Rami 

 alterni plani lanceolati — E marginibus ramorum cilia emittuntur 

 numerofifTima, ramofifTima, linearia, faepe fub-capillaria— 5'a^<7«//<« 

 membranacea — Color ruber — Frti£tiJicationem nondum vidimus, at 



haud 



