Report on the New York State Museum. 13 



tions. Such a work was printed in the Annual Report of the 

 State Museum of Natural History for 186'), but the present state 

 of our knowledge on this subject necessitates extensive revision 

 and amplification of the original pamphlet. 



The study of the iron deposits of the eastern Adirondack region 

 and their associated rocks, begun by the writer last year, has 

 been continued by Prof. J. F. Kemp, of Columbia college, who 

 kindly volunteered his services in making a geological map of the 

 Port Henry district. Prof. Kemp's work in this field has been 

 extensive and thorough and an important report will be made. 

 The work of mapping the geology of "VYesichester county, carried 

 on at intervals from 1884 to 1890 by the writer, and continued 

 by him in 1890 under the auspices of the State Museum with the 

 assistance of Mr. E. M. Blake, has been brought nearly to comple- 

 tion during the past 3^ear by the writer and Mr. Heinrich E-ies, an 

 efficient volunteer assistant. The boundary lines between the 

 areas of gneiss, schist and limestone have been carefully traced 

 throughout the greater part of the region not previously mapped 

 and the detailed geology has been studied with sufficient care to 

 permit the geology of the county to be mapped on a scale of five 

 miles to the inch. Much petrographic work, however, remains to 

 be done and at least one more season's field work will be neces- 

 sary to a thorough understanding of the stratigraphic geology of 

 Westchester county. 



The work in Zoology has been continued under the direction of 

 the writer by Mr. Wm. B. Marshall on the same lines as during 

 the previous year and is discussed in detail in his report. The 

 collection of fishes being very meager and the alcoholic specimens 

 being in poor condition for popular inspection it seemed desirable 

 to make a new and complete collection of the food fishes of our 

 State. The Assistant Director communicated with the officers of 

 the State Fish Commission on this subject and an immediate 

 promise of material Avas received and the persons in charge of 

 the various State hatcheries have been directed to supply the 

 Museum with a suite of specimens of the food fishes. The Com- 

 mission has also promised specimens of fishes not used for food, 

 mollusks and other zoological material. It was found upon 

 investigation that there was no existing catalogue of the fishes of 

 ]N"ew York State which was reliable in terminology and complete 



