PLATE Vm— Continued 

 PhACOPS I'.ITO 

 Page -'>;. 

 Fig. 25. Dorsal view of a plaster cast of Dr. Green's type specimen. 

 Fig. 26. Profile view of the same. 



Hamilton group. 

 The original is said to have come from a dark-grayish limestone in New Jersey. 



PlIACOPS NUPERA. 

 Page 27. 

 Fig 27. The type specimen, showing the cephalon and thorax. 



Chemung group. Chemung Creek, Chemung county. 



