522 MAKUAL GP THE MOLLUSCA. 



PLATE IIT. 



Ammonitidcs. 



Page 



1. Goniatites Henslowi, Sby. ^. Carb. limestone, Isle of Man 196 



2. Ceratites noclosus, Brug*. ^. Musclielkalk, Wiirtemberg . . 197 



3. Ammonites plannlatns, Sby. h. Chalk-marl, Sussex 199 



4. ■ rotbomagensis, Brongn. \. Cbalk-marl, Sussex 198 



5. spinosus, Sby. ^. Oxford Claj^, Chippenham.. 198 



G. bifrons, Brug. J. Lias, ^^Yhitby 198 



7. bisulcatus, Brug. f . Lias, Lyme Eegis 198 



8. Crioceras cristatum. Orb. f . Gault, S. France 199 



9. Scaphites equalis, Sbj^ f . Chalk-marl, Sussex 200 



10. Ancyloceras spinigerum, Sby. f . Gault, Folkestone 200 



11. Helicoceras rotundum, Sby. Gault, Folkestone 200 



12. Toxoceras annulare. Orb. ^. Neocomian, S. France 200 



13. Baculites anceps, Lam. \. Chalk, France 201 



1-1. Ptychoceras Emericianum, Orb. f. ISTeocomian, S. France 201 



15. Hamites attenuatuSj Sby. ^. Gault, Folkestone 201 



16. Tm-rilites costatus. Lam. -3-. Chalk-marl, Sussex 200 



