OF THE FAMIL1 OF NAIADES. r>7 



In closing this paper, I take the opportunity of returning 

 my thanks to those friends -who have kindly loaned me their 

 specimens for examination and comparison, and by whose ad- 

 vice I have frequently profited. To P. H. Nicklin, Esq. I 

 feel under peculiar obligations for frequent consultations and 

 assistance: and to W. Cooper, Esq. I am greatly indebted for 

 the opportunity, through his means, of having in my posses- 

 sion for some weeks the identical specimens appertaining to 

 various valuable cabinets in New York, from which Mi 

 Barnes made his descriptions. 



