424 Forty-fifth Report on the State Museum. 



Palaeontology of New York, vol. vii, 1888, pi. 24, figs. 18, 19. 

 Hamilton group. Centerfield, N. Y. 



J. M. Clarke purchase. 



Palaeontology of New York, vol. vii, 1888, pi. 24, fig. 20. 

 Hamilton group. Centerfield, N. Y. 



J. M. Clarke purchase. 



Cyphaspis omata, Hall. 1876. 

 IUustr. Dev. Foss. Exp., pi. 21, fig. 1. 



Palaeontology of New York, vol. vii, 1888, pi. 24, figs. 21, 21a. 

 Hamilton group. Canandaigua, N. Y. 



J. M. Clarke purchase. 



Cyphaspis omata, var. baccata, Hall. 1888. 



Palaeontology of New York, vol. vii, 1888, p. 146, pi. 24, figs. 22, 

 22a. 

 Hamilton group. Canandaigua, N. Y. 



J. M. Clarke purchase. 



Palaeontology of New York, vol. vii, 1888, pi. 24, fig. 23. 

 Hamilton group. Canandaigua, N. Y. 



J. M. Clarke purchase. 



