43 



20. fugaajjima. C. fill s fimplicibus tenuibus flavo virentibus; articulis pel- 

 lucidis medio fcepe granulis fafciatis, diametro lub-fefquiiongioribus. P. B, 



C.fugacijjima. Roth. Cat. Bot. III. p. 176. 



Frequent in Pools and Ditches, adhering to glafs and other fubftances. 



In Mr. Turner's Herbarium there are two fpecimens from Dr. Roth, 

 marked C. fugaajfuna, ef which one belongs to C. foi dida, and the other 

 to the prefent fpecies. It is mod nearly allied to C.fordida, but may be at 

 once diftinguiflied by its far fhorter joints. By drying C. fagac'iflima lofes 

 its color, and gradually becomes of a dirty white. The iketch at Plate B. 

 represents a filament magnified 1 . 



21. fordula.' C. filis fimplicibus, tenuibus, flavo virentibus; articulis pellu- 

 cidis, diametro quadruplo longioribus. T. 60. 



22. altirna'.a. C. filis fimplicibus, tenuibus, glauco virefcentibus •, articulis 

 hie illic inflatis, alternatim pellucidis obfeurifque, diametro fefquilongi- 

 oribus. 



Prolifera veficata. Vaucher. Hi/}, des Conferves t p. 132. t. 14. f. 4. 

 (exc. fyn.j 



S.fufcefcens, filis fufcefcentibus, T. B. 



In a rivulet near Swanfea ; &. In ditches at Stoke Newington ; Mr. 

 Woods. On decayed leaves in the ditches at Heigham, near Norwich \ 

 Mr. Hooker. Ditches about Belfaft ; Mr . Tem'Jeton. Pools near Bantry ; 

 Ali/s Hutchins. 



The filaments grow in loofely entangled mafles, fix or eight inches in 

 length, and are of about the fame diameter as thofe of C. fordida. The 

 color of the plant, which I once gathered near Swanfea, agreed with 

 Vaucher's defcription and was of a glaucous green. The joints are alter- 

 nately opake and peliucid, and fome of them in almoft every filament are 

 remarkably inflated, by which this fpecies may be readily diftinguiflied 

 horn its congeners. The variety 13. appears to differ in no other refpedl 



f 2 



