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NEW YORK STATE MUSEUM 



Canandaigua was the writer's home town and Naples the 

 home of his pioneer ancestors in western New York. During 

 the early years of youthful enthusiasm for geologic study the 

 rocks of Canandaigua and vicinity were the subject of prolonged 

 and careful analysis. In the days from 1870 to 1880 the entire 

 fatfna was studied in such detail that the vertical range of 

 every known species, and many before unknown, of the Hamilton 

 stgge was established and from other formations large accre- 

 tions to known facts were made. So productive were the in- 

 vestigations of this period in increasing our knowledge of these 

 faunas that in the " Monograph of the North American Devonian 

 Crustacea," published at a later date as volume 7 of the 

 Paleontology of New York nearly 200 figures were given of trilo- 

 bites and other crustaceans collected by the writer during this 

 time and in this region. 



The Portage strata of the township of Naples, as a result of 

 careful researches begun then and continued till the present, 

 opened up a virtually new fauna in the New York series. The 

 study of the Portage fauna, desultory at first, began seriously 

 only when in companionship with Mr D. Dana Luther, it was 

 attacked with unremitting assiduity and in this companionship 

 the exploitation of this fauna has been carried forward through- 

 out the entire extent of this formation in the State. For 20 

 years no circumstances were permitted to interfere with the 

 yearly joint attack on this problem, and though this long 

 standing companionship in the field has been latterly inter- 

 rupted by force of circumstance, Mr Luther has diligently 

 carried on the refined stratigraphic study of the Naples 

 rocks and their equivalents while the writer has been more 

 specially concerned in the solution of the paleontologic and 

 bionomic problems to which the faunas have given rise. 



In 1885 1 the writer published a geologic map of Ontario 

 county. Up to that time the rock formations of the region had 

 not been delineated in greater detail than given on the old 



»N. Y. State Geol. 4th An. Rep't. 



