FOSSILS OP NORTH BUCKS AND ADJACENT COUNTIES. 489 
Name, Localities, 
Natica elegans, Sow, ... ... Gay ton. 
Lithodomus inclusus, Phil. ... Gay ton. 
Pteroperna marginata, Lyc. ... Danes' Hill. 
Gervillia acuta, aSom;. ... ... Danes' Hill, Gayton. 
Astarte ... ... ... ... Gayton, Duston. 
Ostraea Danes' Hill, Gayton. 
Lima impressa. Sow. ... ... Gayton. 
Pecten vagans, iSoidJ. ... ... Duston. 
The Northampton sand lies immediately above the Upper Lias 
clay j 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 T 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. 
A ., i- D . f Eydon and Kingthorn 
Ammonites serpentinus, Kein, ... ... < Northants 
„ Kauquinianus, D'Orh. ... „ 
„ bifrons, Brug. ... ... „ 
„ Hollandrei, HOrh. ... „ 
Belemnites breviformis, Volts..,, ... „ 
Leda ovum, Sow. ... ... ... „ 
Myacites unionides, Jg. ... ... „ 
Ichthyosaurus communis. Con. 
Marlstone. 
Ammonites Normianus, 2)' Or6.... ... Milton and Brockall. 
Rhynchonella tetrahedra, aSc)?/?. . . . ... „ 
Terebratula Edward sii, Bav. ... ... „ 
Pecten cingulatus. Gold/. ... ... „ 
Lima punctata, aSoi^j. ... ... ... „ 
Cardinia crassissima, -S'^ttc^. ... ... „ 
Myacites unionides, Ag. ... ... „ 
Marlstone at Hellidon. 
Ammonites falcifer. Sow. 
„ annulatus. Sow. 
„ Hollandrei, D'Orb. 
„ communis, Sow. 
Terebratula punctata, Soiv. 
„ resupinata, Sow. 
Rhynchonella tetrahedra. Sow* 
vol. IV. • 3 H 
