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NOTICE. 



The following Catalogue has been arranged and printed in 

 accordance with instructions left with me by my late brother, 

 Thomas G. Lea. His MSS. and Herbarium were placed in the 

 hands of Mr. W. S. Sullivant, who kindly prepared the whole, 

 with the exception of the Fungi, determined by the Rev. M. J. 

 Berkeley, and the Lichens by Mr. Edward Tuckerman. 



My brother's son, Mr. James M. Lea, has seen to its progress 

 through the press, under the supervision of Professor Asa Gray 

 of Cambridge. 



By the kindness of these gentlemen, his wishes have been fully 

 carried out, and I have every confidence that this Catalogue will 

 possess all the utility desired by him. 



My brother, in his instructions, also desired to acknowledge 

 his obligations to Sir W. J. Hooker and Mr. W. Wilson, for 

 their assistance in authenticating the species of mosses. 



ISAAC LEA. 



Philadklphia, February 1849. 



