In a pond at Wimbledon, Surry. Mr. Dickfon. 



Mr. Dickfon alone appears to have difcovered this fpccies in Britain, and 



to him I am indebted for the fpecimens now before me, which having 



been fent by Mr. Turner to Dr. Roth were returned with the name of C, 



■nigricans. The filaments grow to the length of three or four inches, and 



are irregularly divided by patent dichotonres. The joints, whofe length 



is about four times greater than the diameter, are by Dr. Roth defcribed 



" fpdrulis ubique fpavfr," and in the fpecimen now before me moil of 



them are covered by dark colored fpots, which however feem rather to 



proceed from decay or forhe extraneous matter attached to them. In 



drying it will not in the leaft adhere to either Glafs or Paper. In Plate E 



the plant is reprefented when magnified 4 and 2, and I am indebted to my 



friend Mr. Hooker for the drawing, which was neceflarily made from a 



fpecimen that had been previoufly dried. 



94.. crifpata. C. fili3 ramofis, crifpatis, faturate viridibus -, ramis alternis, 



remotiffimis ; articulis diametro multuplo longioribus, ficcitate alternatim 



compreffis. T. 93. 



95. penv.atula. C. fills ramofiffimis, fiavefcentibus ; ramis ramulifque crecto- 



patentibus, fub-incurvis; articulis cylindraceis diametro fe-xtuplo longioribus. 



C. pennatula. Fl. Dan. t. 945. 



Ditches about Yarmouth. 



Of this plant I have now no fpecimens, but a drawing made by rnyfelf 

 in 1802, from fome individuals gathered rear Yarmouth, fo exactly accords 

 with tire figure in the Flora Danica, that I am led to admit it as a Britifh 

 Conferva, though chiefly for the purpofe of directing the attention of 

 other Botanifts to the fubject, and without by any means pledging myfelf 

 for its being a diftinct fpecies. 

 96.* flavefcens. C. fills ramofifTimis, flexuofis flavo virentibus; ramis fub- 

 dichotomis; patento-horizontalibus ; ramulis lateralibus abbreviatis; articulis 

 cylindraceis diametro decuplo longioribus. T. E. 



