PREFATORY REMARKS. 187 



to authors than is absolutely necessary for the present list, 

 though essential to my original design. 



With this more limited plan, and with its execution, as 

 far at least as regards the determination of several of the 

 species, I am so little satisfied, that had the publication 

 depended entirely on myself, and related solely to the 

 present essay, I should have deferred it still longer, proba- 

 bly until the return of Captain Parry from the arduous 

 enterprise in which he is now embarked. 



I have, however, to express my regret for the delay that 

 has already taken place, as it has prevented the appearance 

 of the valuable memoirs in other departments of Natural 

 History, which have been long ready for publication ; and 

 also as it has till now deprived Botanists of the excellent 

 figures so admirably illustrating the structure of the plants 

 selected for engraving, and for which it is hardly necessary 

 to add that I am indebted to the friendship of Mr. Bauer.^ 



' It has not been thought necessary to reproduce the engravings illustrative 

 of the plants described in the present memoir ; in the Appendix to Captain 

 Franklin's journey ; in Mr. Clarke Abel's journey in the interior of China; and 

 in Captain King's survey of the coasts of Australia. For these plates, in all 

 ten in number, the reader is referred to the works in wliich they originally 

 appeared. — Edit. 



