294 THE MARINE BOTANIST. 



recent state ; for, when dry, it is not at all easy to 

 discriminate them. To the learner, they are a 

 puzzling" g'enus ; and very little knowledge can be 

 gained of them without the constant employment of 

 the microscope. In the comparative length of the 

 joints and manner of branching, as well as in the 

 size and substance of the filaments, are deduced 

 some of the specific characters. In the summary 

 of the species, the reader will find indicated all their 

 most striking specific distinctions. 



MARINE GENERA OF THE CONFERVA 

 TRIBE. 



Cladophora, Filaments tufted, much branched. 

 Hhizoclonium. Filaments decumbent, with root- 

 like branches. 

 Conferva. Filaments unbranched. 



