54 



THE LIAS AMMONITES. 



No. 



LiTHOLOGY. 



Thick- 

 ness. 



Palaeontology. 



31 



32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 



40 



41 



42 



43 



44 



45 



46 



Brought over 



Variable blue-black shales, with scat- 

 tered doggers ; flat 



ft. in. 

 69 7 



14 



2 



1 4 

 8-10 

 5 



9 



2 3 



1 8 



5 



8 



1 3 



2 4 



4 6 



3 6 

 2 



Pentacrinus tuherculatus. 



Aeg. sagittarium, Bel. acutus, 



Ostrea arcuata, Bel. acutus. 



Aeg. sagittarium. Pent, tuherculatus. 



Aeg. sagittarium, Bel. acutus, Ostrea arcuata. 



Aeg. planicosta, Ar. obtusus, Ar. stellaris, Aeg. 

 sagittarium, Hippopodium ponderosum. 



Pentacrinus tuherculatus, Bel. acutus, Pecten 

 priscus, Ostrea arcuata. 



Pent, tuherculatus, Pecten priscus, Ostrea 



arcuata. 

 Ostrea arcuata, Cardinia hyhrida, Hippopodium 



ponderosum. 



Aeg. planicosta. 



Thin whitened band 



Shales 



Whitened band 



Shales 



Harder whitened band 



Shale 



Thick whitened band 



Blue shale, unseen in the cliff with line 

 of crustacean nodules 



Hard brown limestone band, forming a 

 scar 



Hard blue shale, with line of scattered 

 doggers three feet down 



Hard calcareous rubbly stone, forming 

 a very strong continuous scar 



Blue shale with oyster beds 



Indurated limestone band 





Soft blue smooth shale, with round 

 nodules 



Indurated calcareo-argillaceous rubbly 

 band, speckled brownish 



Total thickness 



107 10 



The palteontology of the Ox^ynotus-zonQ is remarkable for the small number of species 

 it contains, when compared with the richness of the BucMandi- and Angulatum-iGnss, 

 which preceded and the fertility of the Jamesoni-7.QX\Q which succeeded it. 



Fossils of the Oosynotus-zone. 



Cephalopoda. 



Amaltheus oxynotus, Quenst, 



— Lymensis, Wright. 



— Oppeli, Schlonhach, 



— denotatus, Simpson, 



— impendens, Toung ^ Bird. 



— Simpsoni, Bean. 



— Guibalianus, d'Orhig. 

 Aegoceras biferum, Quenst. 



Pleurotoniaria similis. Sow. 

 Actseonina fragilis, Bunk. 

 Cerithium gratum, Terq. 



Aegoceras lacunatum, Buck. 



— gagateum, Toung ^ Bird. 



— sagittarium, Blake. 

 Nautilus intermedins, Sow. 

 Beleranites acutus. Mill. 



— calcar, Phill, 



— penicillatus. Sow. 



Gasteropoda. 



Turritella Dunkeri, Terq. 



— Zenkeni, Dunk. 



Hydrobia solidula. Bunk. 



