Plate J/. 



Fig. 1. Cribrostonioiilcs bradyi. X 25. a, side view; b, apertural view. 



2. Trorhammiiia squamata, attached to Ammodiscus. X 30. 



3. AmmobaculUcs calcareum. X 18. 



4. Ammobaculites agglutinans. X 25. 



5. Ammobaculites rylindricus. X 25. 

 50b 



