f T l. 



PREFACE. 



-:o:- 



^ AVAIL myself, of the last opportunity which I 

 ^^ shall have, for a word with my readers, to add 

 a point or two, to what will be found on /. ^, <?/ seg'., 

 of the " Introduction," concerning the method of this 

 book. I have attempted to make a book, which 

 should be a real, and helpful guide, to those, who, 

 though not expert botanists, and not having, or using, 

 any aids to a good pair of eyes, other than a simple 

 pocket magnifier, desire to begin the collection, and 

 study, of marine plants. I have been obliged, there- 

 fore, to resort to many devices, for making the novitiate 

 see, for the first time, in these plants, what is so 



