ZONE OF ARIETITES BUCKLANDI. 



37 



No. 



LlTHOLOGV. 



Thick- 

 ness. 



Organic Remains. 



Dark shales 



ai 



45 



44 

 43 



42 

 41 



40 

 39 



38 



37 



36 



35 

 34 



33 



32 



31 



30 



24 



23 



22 

 21- 



11, 



Dark-grey limestones 

 Dark shales 



Grey limestone. 

 Dark shales. 

 Grey limestone . 



Dark shales 



Bluish limestone 



Thirteen or fourteen limestone bands, 

 with irregular surfaces ; some nodu- 

 lar, with partings of clay and shale 



From sixteen to eighteen beds, compris- 

 ing 20 inches of stone 



Fourteen beds of limestone and clay ... 



Eight beds of limestone and clay 



Thirteen beds of limestone and clay ; 



the limestones irregular, water-worn, 



and nodular 



Dark laminated shales 



Grey limestone. 

 Dark shales. 



Greyish limestone 



Ten beds of shales and limestone ; sep- 



taria in the lower beds. 

 Thin grey limestone. 

 Thick dark clay. 

 Thin band of limestone. 

 Dark clay. 



Thin band of limestone 



Thick dark shales. 



25. Six beds of limestone, alternating 



with six thicker beds of clay 



Light-coloured limestone. 

 Dark-coloured shale. 

 Light-coloured limestone. 

 Dark shale. 



Thick "White Lias 



Twelve beds of White Lias, separated 



by 12 thin bands of clay 



10. Four beds of limestone, becoming 



thin and rubbly beneath, and nodular 



at the base 



Gotham marble or Landscape-stone 



feet. 



80 



75 



70 



65 



60 



50 

 43 



40 

 35 



30 



Pentacrinus tuberculatus, Mill, (stem), and 

 Pecten textorius, Schloth. 



Ichthyosaurus communis, Conyb. 

 Gryphcea arcuata, Lamk., and Pentacrinus 

 tuberculatus. Mill. 



Ichthyosaurus communis, Conyb., and Ar. 

 Conybeari, Sow. 



Pinna Hartmanni, Ziet., and Gryphcea ar- 

 cuata, Lamk. 



Pholadomya glabra, Ag., and Lima pecti- 

 noides, Sow., Gryphcea arcuata, Lam., and 

 Rhynchonella variabilis, Schl. 



Pholadomya glabra, Ag., and Lima gigantea, 



Sow. 

 Pecten textorius, Schl. Pholadomya glabra, 



Ag., and Pleurotomaria similis, Sow. 



Lima pectinoides, Sow., and Cardinia ovalis, 

 Stutch. 



Pholadomya glabra, Ag., Rhynchonella vari- 

 abilis, Schl., and Ostrea Goldfussi, Bronn. 



Ostrea Goldfussi, Bronn. 



Pinna Hartmanni, Ziet., and Unicardium 



cardioides, Phil. 

 Pecten textorius, Goldf., and Pholadomya 



glabra, Ag., Modiola Hillana, Sow., and 



Avicula Sinemuriensis, d'Orb. 

 Forms the base of the White Lias series. 



