GRAPTOLITES OK NEW YORK, PART 2 



331 



259 



\ 





^ 



260 



Fig. 259-64 ( Dicranograptus spinifer Lapworth. Fig. 259 Sicular 

 end of a specimen showing the sicula. Original from Stockport, N. V. and in 

 National Museum, Fig. 260 Portion of uniserial branch. Fig. 261 Portion of 

 biserial branch partially infiltrated with pyrite and preserving the original form 

 of the thecae. Figures 262 and 263 show the character and length of the biserial 

 portion. The originals of figures 260 and 262 from Mt Moreno; those of figures 

 261 and 263 from Glenmont. Fig. 264 A somewhat poorly preserved specimen 

 from the Utica shale at Dolgeville, possibly a ramosus. All are enlarged 

 x 5, except figure 261 which is enlarged x 7. 



M 





263 



