CONFERVA LUCENS. 



C. filamentis flmplicibus tenuibus glaucis lubricis; articulis breviufculis ; 

 granulis in fafciis coacervatis. 



On Rocks and Stones in clear rapid Rivulets. Frequent in Monmouthfhire. 

 Jof. Woods, jun. Alfo in Ghmorganlhire. 



THIS elegant fpecies is found not unfrequently in the clear rapid rivulets 

 of Glamorganshire, and most probably of other mountainous Counties ; but 

 does not often occur in a perfect ftate, the ends being extremely liable to be 

 broken off, and the plant otherwife injured by the a&ion of the current againft the 

 rocky and pebbly bottoms on which it grows, efpecially when the ftreams are 

 fwoln and flow with more than ufual rapidity. 



The filaments are fimple and flender, and taper towards the ends, in length 

 feldom exceeding three inches. The joints are fhort and almofl pellucid near 

 the diffepiments with a band-like aggregation of granules in the middle. When 

 gathered and placed in ftagnant water the filaments greatly refemble those of C. 

 fpiralis, but their different places and modes of growth will readily diftinguifh the 

 two plants when growing. C. rivularis may at once be known from C. lucens 

 by its darker colour, far greater length, and twilled growth. 



In drying it adheres to either glafs or paper. 



A. C. lucens, natural fize. 



B. Ditto magnified 3. 



C. Ditto Ditto I. 



