of Lemaiiea fluviatilis, Agardh. 401 



tical ; and it may easily be conceived to what confusion and mischief the 

 promulgation of such errors may give rise. 



EXPLANATION OF PLATE XIX. 



Fig. 7- The young state oi Lemanea fluviatilis, Agardh, of the natural size. 



Fig. 8. The same, highly magnified, showing at a, the early development of a branch ; 



b, another branch, more advanced, from which rootlets are given off at the base ; 



c, a still more developed branch, attached by its roots. 



3 G 2 



