RED ALGm. 199 



are longest in old parts of the frond, and gradually 

 shorten towards the ends of the branches, till at last 

 they appear under the lens, like a string of very small 

 beads. 



In other than the normal forms, these constrictions 

 are not apparent except to a microscopical examination. 

 The beginner is advised to put doubtful cases aside, 

 and wait till a greater familiarity with the species 

 enables him to be sure of them. I have found the 

 typical forms to be mostly of a brownish purple color, 

 darker on paper, while many of the others are of a 

 decidedly pale green, touched with whitish yellow in 

 spots, with perhaps here and there brown branches 

 ■intermingled. It is a deep water plant, and may be 

 got through the warm season. 



Qenus.— LOMENTARIA, Lyngb. 



This genus is represented by two not very common 

 species on our eastern coast, but one of which, how- 

 ever, is of sufficient importance to come within the 

 scope of this book. 



LOMENTARIA BaILEYANA, HaRV. 



This is a very beautiful little plant, growing in 

 globose tufts, two or three inches high. It is of a 



