Diplograptus peosta Hall ^| 



Fig. 17 Specimen in natural size from Indian Ladder beds. Indian Ladder^ 

 Albany county, N. Y. 



Diplograptus (Mesograptus) mohawkensis nov. 

 I^age 80 



Fig. 18 Typical (holotype) specimen from Canajoharie shale, Swartztown 



creek near Amsterdam, N. Y. Natural size. 

 Fig. 19 Specimen (paratype) from Canajoharie shale at the Carlsbad Spring 



near Saratoga Springs, N. Y. 



Diplograptus (Amplexograptus) macer nov. 



Page 82 



Fig 20, 21 Cotypes. Natural size. Uppermost Canajoharie shale at Mina- 

 ville, Montgomery county, N. Y. 

 The originals are in the New York State Museum. 



128 



