80 Annals of the Carnegie Museum. 



1 7. The same species. A free cheek. X 4- 



1 8. The same species. A glabella. X 4- 



19. Cybele prima Raymond. A glabella. X 4. 



20. Nieszkowskia sp. A pygidium. X 4- 



21. Nieszkowskia or Fseudos phcerexochtis . Hypostoma supposed to belong to 

 one of these genera. X 2. 



22. A large hypostoma belonging to one of the Ceraurida, but too large to 

 belong to any of the known species in the Chazy. Natural size. From Cooperville, 

 New York. 



