5 I 8 NEW YORK STATE MUSEUM 



PLATE 15 



Genus pleurograptus Nicholson 

 Pleurograptus linearis (Carruthers) 



Page 269 



1 Single specimen observed 



Utica shale, Holland Patent, N. Y. 



Genus amphigraptus Lapworth 

 Amphigraptus divergens ( Hall) 



Page 271 



2 One of the type specimens (cotype) 



Normanskill shale, Kenwood, N. Y. 



3 A larger specimen from the type locality (topotype) 



Amphigraptus multifasciatus (Hall) 



Page 272 



4 Copy of the original drawing 



GenUS SYNDYOGRAPTUS IIOV. 



Syndyograptus pecten sp. now 



Page 267 



5 Group of specimens showing the habitus of the form 



6 Rhabdosome with greater number of branches 



All figures are drawn in natural size. The originals of figures t, 4, 

 5, 6 are in the New York State Museum ; that ol figure 2 is in 

 the American Museum of Natural History and that of figure 4 

 has not been located (probably Chicago University). 



