EPLANATION OF THE PLATES. 
2. Baculites asper, 
3. Scutella Rogersi, 
PLATE XVI. 
Fig. 1, 2, 3. Ammonites Conradi, 
4, Cast of Nautilus Dekayi, from Fig. 3. Represents the type of this 
Alabama. 
5. Cast of Cucullea vulgaris, 
6. Cast of Cucullea antrosa, 
7. Flustra sagena, 
8. Eschara digitata, 
9. Scalaria Sillimani, 
. Baculites labyrinthicus, 
. Inoceramus Barabeni, 
. Crassatella vadosa, 
3 
. Natiea abyssina. P 
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, Gryphea Pitcheri, 
10. Scutella crustuloides, 
11. Turbinolia inauris, 
21. Serpula barbata, 
13. Trigonia thoracica, 
14. A tooth from the Calcareous 
strata of South Carolina. 
# 
most variable species, 
Fig. 2. Var. A. of same, 
Fig. 1. Var. B. of same, 
4, Ammonites syttalis, 
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, 
5. Avicula laripes. 
alveatus, 
PLATE XVIII. 
Fig, 1, 2. Palate bones of a fish? 
8. Nautilus Alabamensis. 
PLATE XIX. 
Fig. 1. Pecten quinquecostatus, 
2. Pecten Poulsoni, 
3. Ostrea cretacea, 
4. Ammonites Conradi, var. C. 
6. Natica petrosa, 
te 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. 
