42 



THE LIAS AMMONITES. 



Horizon. 



Petrology. 



PaL/EONTOLOGY. 



Lower Semes. 



Black, crumbling 

 shales, covered by 

 thin, earthy, shelly 

 limestones, 19 feet 

 thick. 



Arietites Conyheari, ISucyclus elegans, Bissoa nana, 

 Ti»-lo philemon, Biscohelix Oppeli, D. striata, Tan- 

 credia ovata, Plicatula Hasina, Bhyn. plicatissima, 

 Montlivaltia Haimei, Galeolaria socialis. 



Middle Series. 



Soft blue shales, with 

 rows of small lime- 

 stone nodules in the 

 upper part, friable 

 shales, with shelly 

 bands, thickness 93 

 feet. 



Arietites hisulcatus, Aegoceras Charmassei, Crypt csnia 

 solarioides, Turbo solarium, Cerithium gratum, Turri- 

 tella Bunkeri, Lima gigantea, Unicardium cardioides, 

 Cardinia erassiuscula, C. concinna, C. Listeri, Sippo- 

 podium ponderosum, Gryphcea arcuata, Lucina lim- 

 bata, Pecten lextorius, Montlivaltia Guettardi. 



Upper Series. 



Earthy limestones, and 

 calcareous shales, 

 with agillaceous beds, 

 thickness about 66 

 feet. 



Arietites Turneri, A. semicostatus, A. Sauseanus, 

 Belemnites acutus, B. infundibulum, Cardinia Listeri, 

 GryphcBa arcuata, Lima gigantea, Pecten Thiollieri, 

 Monotis incequivalvis, Spiriferina Walcotii, Acrodus 

 nobilis. 



TalcBontology of the BucMandi Zone. 

 Reptilia. 



I Ichthyosaurus platyodon, Conyb. 



— tenuirostris, Conyb. 



Pisces. 



Ichthyodorulites of Hybodus reticulatus, Agass., and teeth of Acrodus nobilis, Agass. 



Cephalopoda. 



Ichthyosaurus communis, Conybeare 

 — intermedins, Conyb. 



Arietites Bucklandi, Sow. 



— hisulcatus, Brug. 



— Conyheari, Sow. 



— Sauzeanus, 31' Orb. 



— semicostatus. Young ^ Bird. 



— Brooki, Sow. 



— Scipionianus, d'Orb. 



— rotiformis. Sow. 



Pleurotomaria similis. Sow. 



— Hennocqui, Terq. 



— conoava. Mart. 



— tectaria, Tate. 

 Cryptsenia solarioides. Sow. 



— rotellaeformis. Bunk. 

 Actaeonina, fragilis, Bunk. 



— sinemuriensis. Mart. 

 Turbo solarium, Piett. 



Aegoceras Charmassei, d'Orb. 

 Amaltheus Greenoughi, Sow. 

 Nautilus striatus. Sow. 

 Belemnites acutus. Mill. 



— pencillatus, Sow. 



— calcar, Phil. 



— infundibulum, Pkil. 



Gasteropoda. 



Turbo philemon, d'Orb. 



— reticulatus, Moore. 



— Wilsoni, Tate. 

 Rissoa nana Mart, 

 Phasianella Morencyana, Piette. 

 Pitonellus sordidus, Tate. 

 Eucyclus elegans, Miinst. 



— selectus, Chap. ^ Bewalq. 

 Trochus Redcarensis, Tate. 



