The joints are oblong, narrowed in the middle, and beautifully reticulated with 

 dark colored veins : their length is about equal to eight times their thicknefs. 



Mr. Turner and Mr- Sowerby found near Penzance, a gigantic variety of this 

 plant, extending to two feet in length, and with the joints of its branches quite 

 obfolete. 



In drying, the colour becomes darker, and it will adhere (lightly to paper, but 

 not at all to glafs. 



The drawings of C. fluviatilis and gelatinofa, were executed by Wm- W. 

 Young, an ingenious artift at Swanfea. 



A. C. fluviatilis, natural fize. » 



B. Ditto, magnified 4. 



C. Ditto, 2. 



