36 



THE LIAS AMMONITES. 



friend, Mr. William Sanders, F.R.S., made the following profile during the execution of 

 the work, which, together with his notes ou the fossils contained in the different strata, 

 have been kindly communicated by my friend, Mr. Etheridge, E.R.S. This section is of 

 great value, inasmuch as the beds are now partially concealed by debris and vegetation, 

 and the characteristic fossils are no longer found in their respective beds. 



Section of the BucMandi-Beds at Saltford, near Bath, Great Western Bailway} 



No. 



LiTHOLOGY. 



Thick- 

 ness. 



Organic Remains. 







feet. 







Brown gravelly marl 



120 







Beds of laminated shale and clay 



110 







Dark clay, with boulders, and layers 





Scales of Tetrayonolepis monilifer, Agass., and 





of septaria at the top and bottom of 





Belemnites acutus, Mill. 





the bed, and in the clay between 



105 





59 



Grey Lias limestone 



100 



Rhijnchonelld variabilis, Schloth. 

 Belemnites acutus, Mill. 



58 



Dark shale 





Grey Lias limestone. 





Dark shale 





Ostrea Goldfussi, Broun, Avicula calva, Schlon., 

 and Pecten textorius, Schlot. 





57 



Grey Lias limestone 





Arietites Conybeari, Sow., and Belemn. acutus, 

 Mill. 











Dark shale. 







56 



Thin limestone-band. 









Dark limestone 





Nautilus striatus, Sow., Ariel. Conybeari, Sow., 

 and Belemnites acutus. Mill. 





55 



Grey Lias limestone 



Dark limestone. 



95 



Lima gigantea. Sow., and SpiriferinaWalcotti, Sow. 



54 



Grey Lias limestone. 

 Dark shale. 







53 



Grey Lias limestone. 

 Dark laminated shale. 







52 



Dark grey Lias limestone 





Vertebrse of Ichthyosaurus, Ar. Buohlandi, Sow., 

 and Spiriferina Walcotti, Sow. 





Dark shale 





Ar. Bucklandi, Sow., Nautilus striatus, Sow., 

 and Spiriferina Walcotti, Sow. 



51 



Grey Lias limestone 



Dark shale. 



90 





50 



Grey Lias limestone 





Hybodus curtus, Agass. 





Dark shale , 





Pholadomya glabra, Agass. 



49 



Grey J/ias limestone 





Nautilus striatus. Sow. (large), Ar. BrooTcii, Sow., 

 and fossil wood. 



48 



Dark shales 





Ar. Conybeari, Sow., and Ar. Bucklandi, Sow. 

 Pleurotomaria similis, Sow., and Litna gigantea, 



Grey Lias limestone 





Dark shales 





Sow. 

 Ar. Bucklandi, Sow., and Pleurotomaria similis. 

 Sow. 



47 



Grey Lias limestone. 







Dark shales 





Arietites Conyb eari, Sow. 

 Nautilus striatus, Sow. 



46 



Grey Lias limestone 





1 This section shows the relative position of the zones of Ar. Buclclandi, Aeg . planorbis, and Avicula 

 contorta in this part of the county, and affords a good type for comparing these three stages in Somerset- 

 shire with the same groups in other parts of the south of England. 



