T. Davidson — On the Geology of Nice. 313 



Cketaoeous Period — continued. 



TJegonien, D'Orb. Speeton Clay, Judd (Pars). Lower Green Sand (Fitton). 

 Upper ie«f— Marly limestones (Glauconie), not very siliceous, and breaking 

 up by exposure to air. Inc. from 45 to -55 deg. N.W. ; 90 cent, thick. 

 Fauna rich here and there, but the fossils generally attaining small dimen- 

 sions. JBelemnites, Ammonites, Gasteropoda, Brachiopoda, etc. Loc. Drap, 

 Sauree, Ese, Mt. Chauve, etc. 



— Lower bed — Compact spathose marly limestones, with green siliceous grains. 



Inc. as above ; rich in deep sea fossils of large dimensions. Ancyloceras, 

 Samites, Nautilus varulensis, etc. Loc. Eevel, Ese, Rap, Rayet, etc. 



Neocomien, Thurm. Upper bed — Lead grey, marly limestone, neither siliceous 

 nor oolitic. Inc. 50 to 60 deg. N.W. ; 60 cent. ; very rich in fossils, but 

 often confounded with those from the Cenomanian Stage of Nice on account 

 of their colour. Hamulina Emerici, D'Orb. Tereb. diphyoides. District 

 near Grasse, Mount Cheiron. 



Lower bed — Bay coloured marly limestone, with ferruginous oolitic structure 

 (Fauvonie). Inc. as above ; 70 cent, thick. Very rich in fine fossils, but 

 always found in depressions or faults. Nautilus Neocomiensis, Am. Neoco- 

 miensis. Loc. Mount Chauve, Mount Leuse, Drap, Turbie. 



Wealden. "Weald Clay wanting. 

 IV. Jurassic Period. 



PoRTLANDiEN, D'Orb. Portland stone and sand. Upper bed — Earthy grey 

 ' compact limestone. Inc. 70 to 80 deg. N. ; 150 metres thick. Few fossils. 

 Nerinea terebra, Ziet. Pentacrinus. Loc. Sarratan, Drap, Turbie. 



KiMMERiDGiEN, D'Orb. Kimmeridge Clay, Fitton, wanting. 



CoEALLiEN, Thurm. Coral-rag (Phil.). Upper bed — Milky white limestone, 

 with fine grains (strong lime). Inc. 65 to 85 deg. N. ; 20 metres thick. 

 Rich in Zoophytes (corals). Dieeras arietina, D. Moses, etc. Loc. Mount 

 Chauve, Lazaret of Nice, Cap Martin. 



Middle bed — Grey, sulphated, amorphous, masses, red and black in colour. 

 Cidaris coronata, Goldf. Ostrea gregaria, Sow. Loc. Cimies, near Nice, 

 Col of Villefranche, etc. 



Lower bed — Dolomitic mass, white, grey, red in colour, saccaroid. Acrocidaris 

 tuberosa, Ag. ; Astarte elegans. Loc. Mount Vinaigrie, St. Pons, Baus-Rous. 



OxFOEDiEN, D'Orb. Oxford Clay (Phil.). Upper bed — Compact and nodular, 

 marly limestones. Inc. 70 to 90 deg. N. ; 50 metres thick. Tolerably 

 rich in Ammonites, Amm. tortisulcatus, A. tatricus, A. perarmatus. Loc. 

 Caire of Mount Causimagne. 



— Middle bed — Compact limestone, with siliceous nodules. Inc. 70 to 90 



deg. N. ; 80 metres thick; poor in fossils. Loc. Valley of St. Andre, 

 Mount Leuse, near Nice. 



— Lower bed — Metamorphic limestone, Gypsum and dolomite. Loc. Mount 



Ferrillon, Mount Agel, etc. 

 Callovien, D'Orb. =Kelloway-rock (Phil.). Upper bed — Compact limestone, 

 without Oolites. Inc. from 75 to 95 deg. N. Amm. athleta. Sow. Loc. 

 Valley of St. Andre, near Nice. 



— Lower bed — Compact, slightly Oolitic limestone. Inc. as above ; 1 metre. 



60 cent, thick. Loc. Caire of Mount Chauve, near Nice. 

 Bathonien, D'Omalius, Great Oolite (Phil.) Upper bed — Compact limestone, 



large oolitic grains, etc. Inc. 75 to 95 deg. N. ; 20 meti-es thick ; poor in 



fossils. Loc. Grasse, La Marbriere. 

 Bajocien, D'Orb. Grey Limestone (Phil.) Upper bed — Ferruginous Oolitic 



limestone, etc. Inc. as above. Loc. Mouans-Sartoux, Tignet, Mongins. 

 ToAKCiEN, D'Orb. Upper Lias Shale (part, Phil.) Upper bed — Calcareous 



marls, crumbling by exposure to the atmosphere, etc. Inc. 70 to 80 deg. N. ; 



8 metres thick. Amm. Eolandrei, D'Orb. Loc. Col de Monale, St. Dalmas 



le plan. 



— Lower bed — Blue limestone, Dolomite or Gypsum ; rock well crystallized. 



Am. annulatus, Sow. Loc. Cime de Coss, Col_de Monnier. 



