PREFACE. IX 



also assisted me in proportion to the extent of tlieir respective collections, 

 and to them also I return thanks. 



It is only justice to a master spirit in Zoology, who, with more imperfect 

 knowledge of facts than we possess, was endowed with deeper intuition 

 than is usually given to man, that I should conclude this preface with the 

 following quotation from Oken's Physiophilosophy 3526.* What he dis- 

 cerned, I have endeavored to demonstrate. 



"I liave also declared the Rhynchophora to be the lowest and the Lamel- 

 licornes the iippermost in rank. A view, which at present appears to be 

 generally adopted." 



PJiiladelpMa, December 23(Z, 1876. 



* Elements of Physiophilosophy, by Lorenz Oken, M.D., from the German, by 

 Alfred Tulk, London, Ray Society, 1847. The remainder of the section cited may 

 be read with profit by all students disposed to accept words of advice from one 

 who was well qualified to give instruction; but it is too long to be quoted on 

 the present occasion, though teeming with thoughts suggestive of much that 

 has since been adopted, without due reference to the original soui'ce. 



