be to 
GEOLOGY OF THE FOURTH DISTRICT. 
ORGANIC REMAINS OF THE NIAGARA GROUP. 
No. 19. 
Fig. 1. 
Platynotus Boltoni, Conrad, Annual Reports. (Paradoxides Boltoni, Bigsby. Green, 
Monograph, p. 60). This is one of the most rare and beautiful of the trilobites 
in the .Niagara group. Lockport. 
Bumastis barriensis. Specimen of the ordinary size. Lockport. 
Ascijdms coryphceus. (Jour. Acad. Nat. Sci. Vol. 8, page 277, pi. 16, fig. 15). Lock- 
port. 
9 
