INTRODUCTION. 



It has been alleged by students, and cer- 

 tainly with much truth, that the instructions 

 for collecting and preserving sea-weeds, to 

 be found in recently - published works, are 

 not sufficiently comprehensive and explicit ; 

 and that other and more practical details are 

 required to enable them to exhibit in a satis- 

 factory manner the specimens they have been 

 at the trouble of collecting. 



It is not my intention to offer any apology 

 for publishing a work like this, but to con* 

 tent myself with stating, that for several years 

 I have been solicited to do so, by numerous 

 persons residing in my own neighbourhood, 

 and by correspondents and strangers from 



