330 



THE WONDERS OF GEOLOGY. 



Lect. IV. 



specimens have been collected from the marl at Clayton 

 Hill, Sussex.* 



The Maestricht beds, as before remarked, contain many 

 fossils not found in the other chalk strata. A large Volute 

 (V. Faujasii) occurs in the flint nodules of St. Peter's 



12 3 



Lign. 63. — Shells from the chalk formation. 



Fig. 1. Inoceramus concentricus ; from Gait. 



2. Turrilites costatus ; Chalk-marl. 



3. Inoceramus sulcatus ; Gait. 



4. Inoceramus Lamarckii ; White-chalk. 



5. Belemnites Listeri; Gait. 



6. Hamites ; Gait. 



7. Ammonites Mantelli ; Chalk-marl. 



8. Plagiostoma spinosum; White-chalk. 



9. Ammonites Sussexiensis; Chalk-marl. 



Mountain, with baculites, ammonites, and other charac- 

 teristic chalk fossils. In the marl at Hamsey, near Lewes, 

 I have discovered a few genera of univalves not pre- 

 viously known in the chalk. 



* Mineral Conchology, vol. v. tab. 426. 



