FOSSILS OF NORTH BUCKS AND ADJACENT COUNTIES. 489 



Name. Localities. 



Natica elegans, Sow. ... ... Gay ton. 



Lithodonms inclusus, Phil. . . . Gayton. 



Pteroperna marginata, Lye. ... Danes' Hill. 



Gervillia acuta, Sow. ... ... Danes' Hill, Gayton. 



Astarte ... ... ... ... Gayton, Duston. 



Ostrsea ... ... ... ... Danes' Hill, Gayton. 



Lima impressa, Sow. ... ... Gayton. 



Pecten vagans, Sow. ... ... Duston. 



The Northampton sand lies immediately above the Upper Lias 

 clay ; but as the three members of the Lias developed in this district 

 do not differ much, either in lithological character or in that of their 

 fossils, from the equivalent strata elsewhere, and as I have already 

 taken up, I fear, much valuable space "with what I have already stated, 

 I must content myself by enumerating the most characteristic fossils 

 of the Lias without giving any description of the strata themselves. 

 I may add, that most of these fossils from the Lias were found by the 

 collectors of the Government Survey last year. 



Fossils from the Lias. — Upper Lias Clays. 

 Name. Localities. 



Ammonites serpentina, Rem { Eydon i^ gth0m 



„ Rauquinianus, UOrb. ... „ 



„ bifrons, Brug. ... ... „ 



„ Hollandrei, UOrb. ... „ 



Belemnites breviformis, Voltz.... ... „ 



Leda ovum, Sow. ... ... ... „ 



Myacites unionides, A g. ... ... „ 



Ichthyosaurus communis, Con. 



Marlstone. 



Ammonites Normianus, D'Orb.... ... Milton and Brockall. 



Phynchonella tetrahedra, Sow, ... 

 Terebratula Edwardsii, Dav. 

 Pecten cingulatus, Gold/. 

 Lima punctata, Sow. 

 Card inia crassissima, Stuck. 

 Myacites unionides, Ag. 



Marlstone at Hellidon. 



Ammonites falcifer, Sow. 



„ annulatus, Sow. 



„ Hollandrei, UOrb. 



„ communis, Sow. 

 Terebratula punctata, Sow. 



„ resupinata, Sow. 

 Phynchonella tetrahedra, Sow. 



VOL. IV. 3 H 



