210 NEW YORK STATE MUSEUM 



86 Spirifer vantixemi Hall 102 Unciiiulus sp. 



89 Stropheodonta varistriata {Con- 

 rad) 



Dig Alternating coarse and fine grained limestone. ... 32 inches 



6 Favosites helderbergiae Hall r 

 86 Spirifer vanuxemi Hall r 

 89 Stropheodonta varistriata {Con- 

 rad) r 



103 Whitfieldella? nucleolata {Hall) 

 146 Leperditia alta {Conrad) c 



D2 Favosites bed. From one to several inches below the base of 

 this bed is a shale seam from V^ to % inch in thickness ; but above 

 the seam the lithic character of the rock is the same as beneath it, 

 that is, a fine grained dark blue limestone similar to the lower por- 

 tion of Dia. This extends up between the heads of the Stromato- 

 pora and Favosites which suddenly become very numerous . . 3 feet 



This bed is subdivided as follows : 



D2a This is made up almost entirely of masses of Stromatopora 

 and Favosites; the interspaces between these are filled with a fine 

 grained, dark blue limestone. Stromatopora individuals are greatly 

 in excess of all other fossils. Specimens of Favosites partially 

 surrounded by Stromatoporoid growths and vice versa are quite 

 common. This layer is specially noticeable when weathered; the 

 concentrically wrinkled laminae of the hydrozoon stand out then 

 very conspicuously. The Stromatoporoid masses vary in diameter 

 from 2 to 9 inches ' 9-10 inches 



The following fossils were found 



2 Stromatopora concentrica? Gold- 

 fuss C 

 6 Favosites helderbergiae Hall C 



i 



7 F. sphaerictis Hall C 

 9 Zaphrentis roemeri Edwards & 

 Haime r 



D2b First crinoidal bed. The rock is coarse grained through the 

 presence of very many crinoid joints. No Stromatoporas were 

 noticed here, but Favosites is still present, though in greatly dimin- 

 ished numbers 1+ foot 



7 Favosites sphaericus Hall C 



Stropheodonta varistriata {Con- 

 rad) r 



D2C A fine grained limestone very similar to D2a. Where this 

 layer is absent it is represented by a weathered line of separation. 



