O NEW YORK STATE MUSEUM 



Herkimer and Onondaga counties and on to Erie county. The 

 outcome of Mr Hartnagel's work has been to demonstrate the 

 continuity of this apparently feeble element in the rock succes- 

 sion and to indicate its significance as a closing phase of the 

 Siluric formation and fauna in the State of New York. Origin- 

 ally brought into the nomenclature of the science as the Coral- 

 line limestone and believed to have a purely local significance in 

 the Helderberg region and the adjoining districts westward, it 

 is now found to have been notably underestimated in its con- 

 tinuity and extent. 



Paleontology and stratigraphy of the slate belt of eastern New- 

 York. Mr Ruedemann, who has been concerned with the prob- 

 lems presented by the obscure and somewhat complicated struc- 

 ture of this region, has continued his investigations, giving 

 special attention to the region about Granville, for the purpose 

 of reexamining the localities from which Messrs Walcott, Dale 

 and Prindle obtained paleontologic evidence during their study 

 of the region. The exploitation of the graptolite faunas of these 

 rocks, which here, as in other parts of the world, have been 

 found of material importance for the correlation of these with 

 distant formations, has led to the restudy of the structure of Mt 

 Moreno near Hudson which, previously known by an excellent 

 exposure of the Normanskill graptolite shale, has become still 

 more interesting by the discovery of the uppermost zone of the 

 Phyllograptus shale before known in New York only from the 

 Deep k^ll section of Rensselaer county. All the data now obtain- 

 able bearing on the composition of these graptolite zones and 

 the correlation of these geologic formations with those of remote 

 regions of the world have been brought together in the form 

 of a monograph of the graptolites of the older New York rocks, 

 and this is now in press. 



Beekmantown and Chazy formations of the Lake Champlain basin. 

 In continuing an examination of the lower faunas of this region, 

 which has been carried on during several seasons, the assistant 

 paleontologist spent the greater part of the field season. The 

 real import of these faunas in the paleontology of New York 



