EXPLANATION OF THE PLATES. 



2. Baculites asper, 



3. Scutella Rogersi, 



4. Cast of Nautilus Dekayi, from 



Alabama. 



5. Cast of Cuculleea vulgaris, 



6. Cast of Cucullaea antrosa, 



7. Flustra sagena, 



8. Eschara digitata, 



9. Scalaria Sillimani, 



10. Baculites labyrinthicus, 



11. Inoceramus Barabeni, 



12. Crassatella vadosa, 



13. Natica abyssina. 



PLATE XIV. 



Two sections of the deep cut of 

 the Chesapeake and Dela- 

 ware canal. See pages 17 

 and 18. 



PLATE XV. 



Fig. 1, 2. Hamites arculus, 



3. trabeatus, 



4. torquatus, 



5. Transverse section of Ammo- 



nites Delawarensis, 



6. Trochus leprosus, 



7. Pectunculus hamula, 



8. Pecten perplanus, 



9. Gryphsea Pitcheri, 



10. Scutella crustuloides, 



11. Turbinolia inauris, 

 21. Serpula barbata, 



13. Trigonia thoracica, 



14. A tooth from the Calcareous 



strata of South Carolina. 



PLATE XVI. 



Fig. 1, 2, 3. Ammonites Conradi, 

 Fig. 3. Represents the type of this 



most variable species, 

 Fig. 2. Var. A. of same, 

 Fig. 1. Var. JS. of same, 



4. Ammonites syrtalis, 



5. Hamulus onyx, 



6. Terebratula lacryma, 



7. Terebratula floridana, 



8. Plagiostoma dumosum. 



PLATE XVII. 



Fig. 1. Ammonites vespertinus, 



2. Belemnites Americanus, var. 



lanceolate, 



3. Inoceramus Barabeni, 



4. alveatus, 



5. Avicula laripes.. 



PLATE XVIII. 



Fig. 1,2. Palate bones of a fish? 

 3. Nautilus Alabamensis. 



PLATE XIX. 



Fig. 1. Pecten quinquecostatus, 



2. Pecten Poulsoni, 



3. Ostrea cretacea, 



4. Ammonites Conradi, var. C. 



6. Natica petrosa, 



7. Delphinula lapidosa, 



8. Baculites columna, 



9. Rostellaria pennata, 



10. Ostrea panda, var. from Alab. 



11, 12, 13, Vertebral bones of 



Fishes. N. Jersey and Del. 



