the Br it ft Fact, with particular T)ejcriptkns of each Species. \^\ 



mote from each other at the bafe of the branches, but cluttered 

 together at the fummit. Thefe cluttered leaves produce a fmall 

 veficle or tubercle on the outfide of their bafe, not much larger 

 than the leaf itfclf : — this proportion of the veficle to the leaf flioukl 

 be conftantly attended to, as it is a very talking mark of diltinclion 

 from felaghw/des in its moil difguifed forms. The leaves at the 

 fummit, cluttered together with the tubercles at their bafe, refemble 

 in fome degree a bunch of grapes in miniature. The fmall branches 

 in this fpecies grow fomewhat zigzag. 



Dr. Withering is the flrft who {tyattXedfeldgtrtotdes from iamarif- 

 cifollus of Hudfon. He gives us alfo Major Velley's remark upon 

 the casrulean tints which are reflected from the branches. It 

 always appeared to us a blue faint light, fuch as is often obferv- 

 able on oyfter-fhells, when the friction of the knife has touched 

 upon a part loaded with nitrous particles. At times this light is 

 very copious, and of courfe truly characteriftic and ornamental : it 

 is obfervable only when under water. 



It adheres to rocks moft ftrongly ; no fucus having a much 

 Wronger organ of adhefion, or a tougher fubttance. 



14. FUCUS GRANULATUS. 



F. fronde filiformi ramofiflima, debili ; foliis fubulatis, laxiuf- 



cule imbricatis, bafi tuberculiferis ; tuberculis contiguis. 

 Sp, PI. 1629. FL Ban, 591. 

 Inter rejectamenta maris apud Yarmouth. 



Radix . Frons ramofiflima pedalis et ultra debilis, effufa, 



ramis alternis denuo confertiflimis, foliis fubulatis acutis brevibus, 

 bafi ad dorfum tuberculiferis — 'Tubercula fubrotunda, minuta con- 



S 2 tigua 



