TO 



WILLIAM BORRER, ESQ., 



F.R.S., L.S. &c. 



DEAR SIR, 



As your suggestion induced me to study the Microscopic 

 Alga with greater diligence, and as I have been mainly indebted to your 

 assistance and encouragement for the successful completion of the present 

 Monograph, I feel it a grateful duty to dedicate to you the collected 

 fruits of my investigations, and, sincerely thanking you for the kind 

 permission to associate them with a name so honourably distinguished 

 in Botanical Science, 



I am, dear Sir, 



Your truly obliged, 



JOHN RALFS. 



