GEOLOGICAL SOCIETY 1( )5 



places in the United States. Green's Monog. p. 79, 

 figs. vii. and viii ; Monthly American Journal, p. 560. 



Genus Trimerus, Green. 



T. delphinocephalus, Green. 



Locality. Niagara county, N. Y. Green's Monog. 

 p. 82, fig. i ; Monthly American Journal, p. 560. 



Genus Ceraurus, Green. 



C. pleurexanthemus? Green. 



Localities. Newport, New York. Green's Monog. 

 p. 84, fig. x. Monthly American Journal, p. 560. 



Genus Triarthrus, Green. 



T. Beckii, Green. 



Locality. Cahooes Falls, New York, and other 

 places. Green's Monog. p. 37, fig. vi. Monthly 

 American Journal, p. 560. 



Genus Nuttainia, Eaton. 

 N. sparsa, Eaton. 

 Locality. Near Albany, New York. Eaton's Geolog. 

 Text Book, p. 33. Green's Monog. p. 80. 



Genus Brongniartia, Eaton. 



B. platycephala, Eaton. 



Locality. Lockport, New York. Eaton's Geolog. 

 Text Book, p. 32. Green's Monog. p. 31. 



Vol. I— 0 



