434 



CRETACEOUS LAMELLIBRANCHTA. 



I.— DISTRIBUTION OF THE LOWER CRETACEOUS SPECIES IN ENGLAND. 



The genera are arranged in the order of the classification followed in this work. The species of 

 each genus or subgenus are in alphabetical order. The stratigraphical divisions are those adopted in 

 the ' Memoirs of the Geological Survey.' 



Genus and Species. 



NUCULANA 



scapha (d'Orb.) 



Seeleyi ( Gard. ) 



spathulata (Forb.) 



speetonensis, Woods 



subrecurva (Ph ill.) 



Nuctjla 



Lamplughi, Woods 



Meyeri, Gard 



planata, Desk 



sp. [Cornueliana, Gard. non d'Orb.] 

 sp. [simplex, Gard. non Desh.] 



Anomia 



convexa, Sow 



laevigata, Sow 



pseudoradiata, d' Orb 



Arca 



Carteroni, d'Orb 



Dupiniana, d'Orb 



Sanctse-Crucis, Pict. & Camp 



Barbatia 



aptiensis (Pict. & Camp.) 



marullensis (d'Orb.) 



(Scaphula ?) Austeni (Forb.) 



Grammatodon 



securis (Leym. ) 



Cucull^a 



Cornueliana (d'Orb.) 



Fittotji (Pict. & Camp.) 



Forbesi (Pict. & Camp.) 



vagans, Keep 



Volume 

 and 

 Page. 



I, 3 

 I, 5 

 I, 1 

 I, 3 

 I, 2 



I, 14 

 I, 15 

 I, 12 

 I, 13 

 I, 14 



I, 29 

 I, 29 

 1,27 



I, 33 

 I, 32 

 I, 34 



1, 35 

 I, 38 

 I, 37 



1,44 



I, 50 

 I, 52 

 1,49 

 I, 52 



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