158 



Scientific Intelligence. 



Bulletin 82, reviewed below. The eastern or Ithaca fauna appears 

 for the first time, but sparingly, in the lower portion of the 

 Cashaqua shale, as far west as the region about Watkins Glen, 

 and there are several alternations of this fauna with the Naples 

 in the higher Hatch shale. The Iowa Lime creek fauna of 32 

 species has its only occurrence near the middle of the High Point 

 sandstone, while Spirifer disjunctus, apparently a migrant also 

 from the west or southwest, is seen for the first time in the Gen- 

 esee valley, in the lower portion of the Prattsburg shale. " The 

 horizon of Spirifer disjunctus follows close on the change from 

 the Naples fauna in western New York at a high altitude above 

 the base of the Portage formation. In central New York there 

 is no such change, but the gradation from the Ithaca fauna out 

 of the Hamilton fauna upward into the association which carries 

 species elsewhere concurrent with Sp. disjunctus is very easy, 

 and it is extermely difficult to draw a division plane anywhere 

 except on the basis of refined distinctions into successive faunules. 

 Spirifer disjunctus in this eastern region did not appear till this 

 period of i Chemung ' deposition was well nigh over." c. s. 



3. Geologic Map of the Tully Quadrangle ; by John M. 

 Clarke and D. Dana Luther. Bull. 82, New York State Mus., 

 1905, pp. 35-70, with map. — This Bulletin describes the follow- 

 ing formations : — 



Neodevonian Senecan 



[ Ithaca 



\ Portage 

 j Genesee 

 l Tully 



f Erian 



Hamilton 



Mesodevonian <J 



I^Ulsterian 

 Oriskanian 



Paleodevonian 



Silurian 



r 

 \ 



I Ma re ell us 



Onondaga 

 Oriskany 



Helderbergian Helderberg 



Manlius 



Cayugan 



Is 



Salina 



Feet. 

 Ithaca flags and 



sandstones 450 



Sherburne flags 210 



Genesee shale 75 



Tully limestone 23 



Moscow shale 180 



Ludlowville shale 350 



Skaneateles shale 335 



j Cardiff shale 175 



( Marcellus shale 100 



Onondaga limestone 65 



Oriskany quartzite 6 



( New Scotland 



■< limestone and 



( Coeymans limestone 40 



I Manlius limestone 74 



■< Rondout dolomite 40 



( Cobleskill dolomite 6 



j Bertie dolomite 15 



\ Camillus shale 40 



The evidence regarding the presence of .the New Scotland in 

 this area is not convincing. As the present writer did not find this 

 formation to the east, about Litchfield, it appears to him more 

 probable that the New Scotland does not occur in the Tully 

 quadrangle. 



