r6 NEW YORK STATE MUSEUM 



Adirondack region, with the purpose of summarizing tlie results of 

 their study of this region during several preceding seasons. Prof. 

 Kemp's report is concerned specially with the geology of Essex 

 county, and that of Prof. Gushing with the geology of Franklin 

 county. Prof. Smyth has rendered a brief report of the progress in 

 the mapping of the crystallines in parts of Hamilton, Herkimer and 

 St Lawrence counties. 



Dr H. B. Kiimmel was engaged for most of the season in a study 

 of the Newark or new red sandstone rocks of Rockland county, and 

 he presents a full and important report on this subject. 



Museum bulletin 21, Geology of the Lake Placid region^ has 

 been prepared by Prof. J. F. Kemp, at the request of Sec. Melvil 

 Dewey for the use of the teachers who frequent that summer resort. 



Considerable time was given to the revision of the geologic map 

 of the state, involving the correlation of the formation boundaries 

 according to newly acquired data. 



In the office, paleontologic investigations w^ere carried forward, 

 pertaining to the study of the fauna of the western Portage or 

 Naples beds. A first instalment of this work, relating to the 

 cephalopods of this fauna, was published in the report for the 

 year 1897, and- another on the lamellibranchs is nearly completed. 

 The study of the Oriskany fauna of Columbia county and of the 

 genera of the Paleozoic corals was also advanced. 



Dr P. M. Bagg jr was employed in Geological hall, under the 

 supervision of the director, as temporary assistant in paleontology 

 for five months, from Nov. 1, 1897, to Mar. 31, 1898, in the revision 

 and labeling of a collection of Mesozoic and Cenozoic fossils of the 

 United States, and the collection of British fossils donated to the 

 state museum by Sir Roderick Murchison in 1857. He also re- 

 identified and relabeled a collection of Cenozoic fossils from France. 

 His report on this work is given herewith. 



A large fragment of a fossil tree trunk, 12 feet long, from 

 Monroe, Orange co., was collected by J. N. Nevius, who devoted 

 several weeks of the summer to the labor of putting together the 

 hundreds of fragments of this fossil plant and preparing it for 

 exhibition in Geological hall. 



Considerable work has been done toward the completion of the 

 introductory and synoptic collections of rocks on exhibition in 



