220 Dr. Goodenough and Mr. WoodwARD'j Obfervations on 



pany with very accurate obfervations, taken on the fpot, we do not 

 hefitate to defcribe it as diftinet from articulatus. It differs in the 

 texture, which is cartilaginous and folid ; in the form of the arti- 

 culations, which are broader and fhorter, in proportion to the fize 

 of the plant, and which are ufually compreiled, though fometimes 

 they may be found filiform ; in the difpofition of the branches, 

 which in this are always dichotomous ; and in colour, this being of 

 a deep red or purple, whilft articulatus is always pale, though both 

 Ipecies are fubjecl: to have the upper joints tinged with green. The 

 place and mode of growth are very different, articulatus growing 

 not only ou the rocks, but being very frequently parafitical on the 

 larger and coarfer Fuci t which are ufually fubmerfed : opuntia, on the 

 contrary, is always found on the naked, and often on the perpen- 

 dicular rocks, between high and low water-mark* The frond ad- 

 heres to thefe rocks by a fmall callous knob, from which ihoots 

 arife, which, where they touch the rock, adhere, and throw out 

 branches; thus forming large tufts, exactly in the manner of the 

 Lichens. The branches are dichotomous, but never verticillated in 

 the manner of articulatus ; and in thefe, we apprehend, as well as» 

 the terminal ones, the feeds are to be found. 



66. FUCUS VARIABILIS. 



F. fronde filiformi ramofimma, ramis fubimbricatis, ramulis 



breviflimis fafciculatis acutis. 

 F. confervoides. Ft. Jtng. $91, 

 Habitat inter rejectamenta maris apud Yarmouth in Norfolcia— 

 apud Exmouth in Devon ia, fed rarius. 

 Radix fibrofa furculos emittens, unde novas oriuntur planta?. 



Frons 



