EXPLANATION OF THE PLATES. 



327 



Plate X. Bivalves. P. 237, &c. 



1. Ostrea Sinensis ? Upper shale. 



2. unguis. Ditto. 



3. Ostrea? Oolite. 



4. Gryphcea dilatata.* , Sandstone. 



5. Pinna capricornus. Ditto. 

 6. folium. Lowest shale. 



* The shells in the chalk resembling gryphites, noticed p. 240, belong to the new genus Inoceeamus, 



Plate XI. Univalves. P. 242, &c. 



FIG. 



1. Trochus magus} Oolite. 



2. Nerita maxima P Ditto. 



3. Buccinum Jiammeum P Ditto. 



4. Trochus radiatusP Ijlue limestone. 



5. Nerita marginata P Oolite. 



6. Cast of a cirrus. Grey limestone. 



7. Turbo P Oolite. 



FIG. 



8. Turbo iumidus P Oolite. 



9. strialus ( Melania striata). Ditto. 



10. Melania Heddingtonensis P Ditto. 



1 L Turrilella conoidea. Ditto. 



13. Patella Icevis. Alum shale. 



13. Dentalium entalis. Lowest shale. 



14. Group of serpulites. Dogger. 



Plate XII. Multilocular Shells. P. 246, &c. 



1. Ammonites Hildensis ( Walcotii). 



Alum shale. 



2. ingens. Pickering oolite. 



3. communis. Alum shale. 



4. u= " subtriangularis. Lowest shale 



5. Silphouensis. Sandstone. 



6. Ammonites cornucopia. Alum shale. 



7. Nautilus subcarinatus. Ditto. 



8. Ammonites tenuicostatus. Ditto. 



9. Pickeringius. Oolite. 



10. Maltonensis. Oolite. 



Plate XIII. Multilocular Shells. P. 248, &c. 



1. Nautilus Whitbiensis. 



2. ' pompilius. 



3. Ammonites subarmatus. 



4. ovatus. 



6. . concavus. 



6. planicosta. 



7. Ammonites elegans. Alum shale. 



Mulgravius. Ditto. 



. armatus. Ditto. 



• Roivlstonensis. Sandstone. 



Clevelandicus. Alum shale. 



Plate XIV. Multilocular Shells, ^r. P. 248, &c. 



1. Belcmnites vulgaris. Alum shale. 



2. ——^ fusiformis. Upper shale. 



3. Section of b. vulgaris. 



4. Belemnites exccntralis. Oolite. 



5. Section of h. cxcentralis. 



6. Belemnites tubularis. Alum shale. 



7. A species of lobster or prawn. Upper shale. 



* This appears to be a smaller species than a. BucJilandi, which is also found in the lowest shale, 

 both at Redcar and Robin Hood's Bay. 



8. Fossil prawn. Oolite. 



9. A kind of crab, resembling a beetle. Ditto. 



10. Another species. Ditto. 



11. Ammonites perarmatus. Alum shale. 



12. ■ ' maculatus. Alluvium. 



13. Redcarensis.* Lowest shale. 



