XIV LETTER OF TRANSMITTAL. 



essay towards the construction and publication of what they 

 will all confess to be a desideratum in geology, viz : a com- 

 plete Encyclopedia of American Fossils, arranged alphabeti- 

 cally, every name furnished with figures, compiled not by one 

 hand, but by the zealous cooperation of all good Palaeontolo- 

 gists in America, for a thing that all need. It has been a dream 

 of mine for twenty years. I could never make it a reality ; 

 but I have been fortunately able to make an experiment by 

 which others can see how it can be done. 



J. P. LESLEY. 



Philadelphia, 1008 Cliiiton street, August 18, 1889. 



