326 



EXPLANATION OF THE PLATES. 



Plate VI. EcMnites, <^c. P. 205, &c 



1 . Cidaris papillata. Maltou oolite. 7. 



2. Cor anguinum. Chalk. 8. 



3. Cidaris diadema. Oolite. 9. 

 4/4. New species of echinite. Ditto. 10. 

 4B.Uiider side of ditto. 11. 



5. A species from calcareous sandstone. 13. 



6. A flint echinite, with rows of small spines; 13. 



perhaps casts of the pores. 14. 



A spinite. Malton oolite. 

 Bent spinites. Kirkby Moorside oolite. 

 Flint echinite; from the alluvium. 

 Cidaris corollaris. Flint: alluvium. 

 Substance like a hazel nut. Oolite. 

 Petrified wood. Oolite. P. 314, Note. 

 Conulus albogaterus. Flint. 

 Anomia producta. Alluvium. P. 230. 



Plate VII. Bivalves. P. 217, &c. 



nc. 



1. Solen ensis. Lowest shale. 



2. Muscle; from the calcareous sandstone. 



3. Pyritous muscle. Alum shale. 



4. Mytilus avicula. Malton oolite. 



5. M. lithopliagus. Oolite. 



G. Mya ovala P Malton oolite. 



7. Cast of a muscle ; from Coldmoor. 



8. Donax ; from the same place. 



9. Curious cast; from the oolite. 



10. Mytilus ungulatus. Oolite. 



11. Donax; from the oolite. 



12. Ribbed bivalve. Oolite. 



Plate Vlll. Bivalves. P. 219, 222, &c. 



riG. PIG. 



1. Shell resembling a cockle. Ironstone. 14. 



2. Tellina crassa. Malton oolite. 15. 



3. Plagiostoma rigida. Ditto. 16. 



4. Cockle ; from the Malton grey limestone. 17. 



5. Cardium pectinatmn. Alum shale. 18. 



6. Venus rugosa P Dogger. 18a, 



7. Vnio Listeri of So^erby. Alum shale. 19. 



8. Anomia arcuala. Chalk. 20. 



9. intermedia. Ditto. 21. 



10. ovoides. Second shale. 31a. 



1 1 . compressa. Grey limestone. 22. 



12. tetraedra. Sandstone. 23. 



13. semiglobosa. Chalk. 



Anomia ornithocephalaP Alum shale> 

 Pyritous shell. Alum shale. P. 231. 



CarditimP Oolite. 



Tellina P Dogger. 



Trigonia clavellata. Pickering oolite. 

 , Hinge of the right valve. 



Trigonia costata. Oolite. 

 Trigonia; from the dogger. 

 Area rostrata. Alum shale. 



Hinge of the sume. 



Valve of a large ark. Oolite. 



Gryphaea incurva. Alum shale. 



Plate IX. Bivalves. P. 232, &c. 



riG. 

 1. Pecten Maltonensis. 



Oolite. 



Roseburiensis. Sandstone. 



sulcatus. Oolite. 



cygnipes. Flat valve. Alum shale. 



Chama calcarata. Ironstone. P. 230. . 

 Picten cygnipes. Raised valve. 



inequicostatus. Oolite. 



suhrufus ? Sandstone : Boulby. 



FIG. 



9. Pecten varius. Oolite. 



10. Scarburg ensis. Sandstone. 



11. pusioP Oolite. 



12. Jihrosus. Grey limestone. 



13. OstreaP Oolile. 



14. ' diluviana. Sandstone. 



15. Donax-formed shell. Lowest shale. P^22I. 



16. Ostrea gregaria. Oolite. 



