162 



ORGANIC REMAINS. 



Plagiostoma. 1. giganteum (Min. Conch, tab. Ixxvii.) .... In marlstone, Staithes, in 



lower shale, North Cliff, ? 

 and Pocklington. 



2. pecteno'ides (Min. Conch.) PI. XII. fig. 13. In calcareous nodules. 



3. rusticum ? (Min. Conch, tab. ccclxxxi.) 1 Marlstone and calcareous 



var. of ditto ? PL XIV. fig. 18. ] 



PL XIV. fig. 18. 



Avicula. 1. inaequivalvis (Min. Conch, tab. ccxliii.) 



2. like echinata 



3. cygnipes (Young and Bird) PL XIV. fig. 3. 



Pecten. 1. sublaevis (Young and Bird) 



2. equivalvis (Min. Conch, tab. cxxxvi.) 



3. lens (Min. Conch, tab. ccv.) 



4. smooth 



Plicatula spinosa (Min. Conch, tab. cclxv-) PL XIV. fig. 16. 



Gryphaea. 1. incurva (Min. Conch, tab. cxii.) 



2. Maccullochii (Min. Conch, tab. dxlvii.) 



3. depressa ... PL XIV. fig. 'J. 

 Spirifera Walcottii (Min. Conch, tab. ccclxxvii.) 



Terebratula. 1. punctata (Min. Conch, tab. xv.) 



2. resupinata (Min. Conch.) PL XIII. fig. 23. 

 3 trilineata (Young and Bird) 



4. acuta (Min. Conch, t. cl.) PL XIII. fig. 25. 



5. bidens (lineata, Y. & B.) PL XIII. fig. 24. 



6. triplicata ... PL XIII. fig. 22 



7- tetraedra (Min. Conch, tab. Ixxxiii.) 



Orbicula reflexa (Min. Conch, tab. dvi.) 



nodules. 



In marlstone universally. 

 In calcareous nodules. 

 Ditto, Bilsdale, Wilton 



Castle, &c. 



Abundant in marlstone. 

 In marlstone and ironstone. 

 In marlstone, Bilsdale. 

 In marlstone, Wilton Castle. 

 In lower shale, Huntclift', 

 Robin Hood's Bay, &c. 



Pocklington, Robin Hood's 

 Bay, &c. in lower shale. 



In lower shale, Robin Hood's 

 Bay. 



In marlstone, generally. 



In calcareous nodules (very 

 rare.) 



Marlstone. 



Ironstone, Wilton Castle. 



Upper shale, (also in the 



dogger.) 



Wilton Castle, Bilsdale. 

 Wilton Castle, Staithes, 



Peak, &c. in ironstone 



and marlstone. 



Ditto. 

 In marlstone and ironstone, 



generally, also upper shale. 

 From the upper shale at the 



Peak, and Whitby. 



