66 



LOWER LIAS. 



LiTHOLOGY. Thickness. 



No. feet. 



55. Gray Lias limestone 95 



Dark limestone. 

 54. Gray Lias limestone. 



Dark shale. 

 53. Gray Lias limestone. 



Dark laminated sliale. 

 52. Dark-gray Lias limestone 



Dark shale 



51. Gray Lias limestone 90 



Dark shale. 

 50. Gray Lias limestone 



Dark shale 



49. Gray Lias limestone 



Dark shales 



48. Gray Lias limestone 



Dark shales 



47. Gray Lias limestone. 



Dark shales 85 



4G. Gray Lias limestone 



Dark shales 



45. Dark-gray limestones 



Dark shales 



44. Gray limestone. 



Dark shales. 

 43. Gray limestone 



Dark shales 



42. Bluish limestone 80 



41. Thirteen or fourteen lime-stone bands, 

 with irregular surfaces ; some nodu- 

 lar, with partings of clay and shale ... 75 



40. From sixteen to eighteen beds, compris- 

 ing 20 inches of stone 70 



39. Fourteen beds of limestone and clay 



38. Eight beds of limestone and clay 



37. Thirteen beds of limestone and clay; 

 the limestones irregular, water-worn, 



and nodular 65 



Dark laminated shales 



36. Gray limestone. 



Organic Remains. 



Lima gigantea, Sow., and Spirifera Walcotti, Sow. 



Vertebrae of Ichthyosaurus, Am. Bucklandi, Sow., 



and Spirifera Walcotti, Sow. 

 Am. Bucklandi, Sow., Nautilus striatus. Sow., and 



Spirifera Walcotti, Sow. 



Hybodus curtus, Agass. 



Pholadomya glabra, Agass. 



Nautilus striatus. Sow. (large), Am. BrooMi, Sow., 



and fossil wood. 

 Am. Conybeari, Sow., and Am. Bucklandi, Sow. 

 Pleurotomaria similis, Sow., and Lima gigantea. Sow. 

 Am. Bucklandi, Sow., and Pleurotomaria similis, 



Sow. 



Ammonites Conybeari, Sow. 



Nautilus striatus. Sow. (large). 



Pentacrinus tuberculatus, Mill., (stem) and Pecten 

 textorius, Goldf. 



Ichthyosaurus communis, Conyb. 



Gryphaa incurva. Sow., and Pentacrinus tubercu- 

 latus, Mill. 



Ichthyosaurus communis, Conyb., aniAin. Conybeari, 



Sow. 

 Pinna Hartmanni, Ziet., and Gryphcea incurva, Sow. 



Pholadomya glabra, Ag., and Lima, n. sp., with 

 large ribs, Gryphcea incurva, Sow., and Rhyn- 

 chonella 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 variabilis, 



Schl., and Ostrea. 



Ostrea. 



