SYNOPSIS OF BBITISB BBAWEBD8. 



multifid; axils all very obtuse and wid 

 *. (Atlas, PL Will. Kg. 76. 

 South of England, and Ireland. Parasitica] on various 



Alga?, in from four to fifteen fathoms water. Verj rare. 



Perennial. 

 It is. ] allow, with some hesitation thai T offer a figure 

 of the present plant as anything more than a deep-water 

 variety of Sphacelaria filicina, analogous to somewhat si- 

 milar varieties of several other Algae, individuals of which, 

 when growing at a more than ordinary depth, differ as 

 much from their normal state, and in a very similar man- 

 ner, as the present does from S. Filicina. Persons s 

 tomed to dredging must be familiar with states of /' 

 mium cocci rieum. Dasya cocci noa. etc.. which are more -len- 

 der than the normal form, irregularly branched, with very 

 patent brandies and ramuli, and which are usually found 

 entangled with other Algae, to which they are attached by 

 hooked processes, different from their true roots. 



74. scoparia (The broom Sphacelaria) ; olive or dark-brown, 

 coarse, the lower part shaggy with woolly fibres ; upper 

 branches once or twice pinnated ; the pinna? erecto-patent, 

 awl-shaped, alternate, the lower ones pinnulate, Li/ngb.Hyd. 

 Ban. p. 104. t. 31. B. (Atlas, PL XVII. Fig. 73.) 



Sphacelaria disticha, Lyngb. S. scoparioides, Lyngb. Ceramium 

 scoparium, Roth. Conferva scoparia, Linn. C. marina pen- 

 nata, Dillen. Stypopodium scoparium, Kl'dz. 

 Hab. Atlantic coasts of Britain. On submerged rocks, within 

 and beyond the influence of the tide. 

 So different from each other are the summer and winter 

 - of this plant that the accurate Lyngbye may well be 

 forgiven for considering them to be distinct species. Few 

 persons, on inspection of our plate in the ( Phycologia Bri- 

 tanuica,' would suppose that the bushy and broom-like 

 upper figure was identical in species with the feathery 

 plant represented below ; even their microscopic characters 

 are widely dissimilar : yet observation, the true i 

 species, has traced the one form into the other. 



75. plumosa {The feathery Sphacelaria) ; filaments naked at 



the base, elongated, irregularly branched, inarticulate; 

 branches pectinato-pinnate ; pinna? opposite, simple, very 

 lone and closely Bet, Lyngb. Ft. Dan. p. 103. t. 30. (Atlas, 

 PI. XVII. Pig. 71.) 

 Chsetopteris plumosus, Ktz. Cerainium peimatum, Fl. Dan. 

 Conferva peimata, Smith. 



