PLATE XLII. 



PAGE 



Figs. 1-4. Balanus crenatus Bruguiere 174 



1. Interior view of a lateral plate, Wailes Bluff. X 7 



2. Specimen showing compartment and basis intact. Same locality. 



X 6 



3. Interior view of a lateral plate of a larger form, Federalsburg. 



X 3 



4. Exterior view of the same specimen. 



Figs. 5, 6. Tornatina canaliculata (Say) 17(J 



5. Dorsal view, Wailes Bluff. X 9 



6. Ventral view of the same specimen. 



Figs. 7, 8. Terebra dislocata ( Say) 177 



7. Dorsal view, Wailes Bluff. X 2V 2 



8. Ventral view of the same specimen. 



Figs. 9, 10. Maxgilia cerixa Kurtz and Stimpson 178 



9. Dorsal view, Wailes Bluff. X 9 

 10. Ventral view of the same specimen. 



