LETTHR OF Ti^\ N S M ITT A L, 



New York, 3Iai/ 38, 1889. 



Dear Sir : I herewith trausinit to you the descriptions: and illustra- 

 tions of the Mollusea and Crustacea of the Miocene formations of New 

 Jersey, whicli will form Vol. in of the Paleontology of New Jersey. 



In presenting this volume of the report I wisli to express my thanks 



to you for the manner in which you have furthered my efforts to obtain 



material for the volume, and also to Dr. N. L. Britton for his kind offices 



in collecting and furnishing specimens and information. To Dr. AV. H. 



Dall, of the Smithsonian Institution and National Museum at Washington, 



I am under special obligation, as he not only obtained for me the loan of 



all New Jersey material at the National Museum, but also sent Mr. Frank 



Burns into the field in New Jersey, where he made extensive collections 



and transmitted them to me for use. Had it not been tor this generous act 



I should have had but a ver}^ meager showing of species for this report. To 



the National Museum I aui thus indebted for the loan of material and the 



expenses incurred in collecting. To Prof Angelo Heilpriu and to the 



Academy of Natural Sciences of Philadelphia, from which I had the loan of 



all their collections of New Jersey material through Prof Heilprin's good 



offices, embracing the types of many of the species previously described, 



I also wish particularly to express my thanks. 



Yours, \^ery truly, 



R. P. Whitfield, 



Geologist. 

 Prof. George H. Cook, 



State Geolofj'ist of New Jersey. 



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