CONFERVA PECTINALIS. 



C. filamentis, fimplicibus, pellucidis, fractis, acuminatis ; diflepimentis 

 fepe folutis ; articulis breviffimis medio cryftallino-pellucidis. 



C. peainalis. Muller in Nov. Ad. Pet. III. 



C. bronchialis. Roth. Cat. Bot. I. p. 1 86. Fl. Germ. III. p. 520. 



In rivers and ftagnant waters, adhering to decaying wood and vegetables. 



MULLER, who firft found this Angular fpecies, and published an excellent 

 figure of it in the paper above referred to, obferves that it is abundant in the 

 ditches about Pyrmont. Dr. Roth alfo remarks that it is not rare in thofe near 

 Vegefack ; and though not one of our mod common fpecies, it frequently occurs 

 in fimilar fituations in many parts of this country, efpecially in tire neighbour- 

 hood of London, where it is very plentiful, and where, early in the fpring of 

 laft year, I firft found it in the company of my friend, Jofeph Woods, junr. 



The filaments are of a dirty green colour ; feldom exceeding half an inch in 

 length, and to the unaffifted eye, refemble decayed vegetable matter. When 

 entire they gradually taper to a point, and, as Muller obferves, bear fome re- 

 femblance to the antennae of a lobfter, but I could never obferve the appear- 

 ance of cylindricity reprefented in the figure of it given by that botanift. The 

 diflepiments are very confpicuous, and at thefe the filaments frequently break ; 

 the parts remaining connected at only one extremity ; which, when it repeatedly 

 takes place, gives the plants fo much the appearance of flocculofa as to make it 

 fomewhat doubtful whether the fpecies are diftincT: : the joints are very fliort, 

 and appear coloured towards each end by a green fluid, which, foon after the 

 plant is taken from the water, and as it approaches to decay, collapfes, fome- 

 times forming into fmall globular manes, and fometimes difapnearing entirely. 



