506 NEW YORK STATE MUSEUM 



PLATE 9 



Genus mastiqograptus nov. 



See plates 10-12 



Mastigograptus simplex (Walcott) 



See plate 12, figures 3-5 

 Page 218 



i Most complete rhabdosome observed 



Utica shale, Holland Patent, N. Y. 



Mastigograptus tenuiramosus (Walcott) 



See plate 10, figure 1; plate n, figures 1-4; plate 12, figures 1, 2 

 Page 216 



2 Rhabdosome showing the typical habitus of the form. The dense mass 



of delicate terminal branches is omitted 



3 Fragment of large rhabdosome with part of main stem 



Utica shale, Holland Patent, N. Y. 

 All figures are drawn in natural size; the originals (topotypes) arc 

 in the New York State Museum. 



