528 NEW YORK STATE MUSEUM 



PLATE 20 



Dicellograptus moffatensis (Carruthers) van alabamensis nov. 



Page 310 



1, 2 Portions of slabs with associated typical specimens, showing the 

 habitus of the form (types on first slab) 

 Shaly Trenton limestone, Pratt's Ferry, Bibb co., Ala. 



Genus dicranograptus Hall 



See plates 21-23 



Dicranograptus nicholsoni Hopkinson 



See plate 21, figure 1 

 Page 317 



3 Group of various growth stages on portion of slab 



Utica shale, Saratoga lake, N. Y. 



4 Large, typical specimen with biserial portion 



5 Very large specimen showing distal reapproachment of branches 



Utica shale, Holland Patent, N. Y. 



All figures are drawn in natural size. The originals of figures i, 2 

 are in the collection of the Geological Survey ol Alabama ; those 

 of figures 3 and 5 are in the New York State Museum, and 

 that of figure 4 is in the National Museum. 



