314 T. P. Barhas — On Ctenodus from the Coal-shale. 



JuBASSio Period — continued. 



LiAsiEN, D'Orb. Maiistone (Phil.) Upper ^e«?— Blackish compact limestone 



Inc. from 75 to 90 deg. N. ; 100 metres thick ; poor in fossils. Amm. 



lunula, Zeit. Loc. Mount Monnier, Fontan. 

 Lower 5fi(?— Metamorphic limestone, black marble, with white sparry veins, 



Coprolites. Loc. Chaudan, Mount Monnier. 

 SiNEMUMEN, D'Orb Lower Lias Shale (Phil.) Upper Je<?— Lead grey coloured 



limestone, breaking up by exposure to the atmosphere. Inc. 80 to 90 deg. 



N. ; 30 metres thick; poor in fossils. Ostrea arcuata, Brong. Loc. Mount 



Van que, Mount Monnier. 

 V. Triassio Period. 



Salifebien, D'Orb. Eed Marl (Murchison). Upper bed — Salt Springs and 



Saline Alluviums. Loc. Amen, Sausse, Eoquette, Tignet. 

 CoNCHYLiEN, Broug. Ncw Eed Sandstone (Murch.). Upper bed — Compact 



Limestone, breaking up by exposure to atmosphere. Loc. Mandelieu, 



Pegomas, lies Lerins. 

 YI. Paleozoic Period. 



Permien, Murch. and Vern. Lower Eed Sandstone. Upper bed — Yiolet coloured 



fine Sandstone of the Vosges, etc. Petrosiliceous rock, without fossils. 



Loc. Belvedere, Val de Spaillars. 

 Caebonifeeiex, D'Orb. Carboniferous Limestone. Upper bed — Eed tinted 



compact Limestone in amorphous masses. Loc. Summit of Mount Bego. 



— Middle bed — Eed and gray slaty schists with iron. Loc. Boquebilliere Fontan. 



— Lower 6e«^— Limestone with quartzose conglomerate, etc. Loc. Foot of 



Mount Bego. 

 Dbvonibn, Murch. Old Eed Sandstone (Miu'ch.). Upper bed — Fetid grey 

 limestone or greywacke. Loc. Mount Eaus, Saorge Breil. 

 Silurian. Upper Silurian (Murch.). Black friable Marly Schists. Loc. Col. 

 Formosa, toot of Mount Abyme. 

 VII. Periods Azoique Stratifiee, D'Orb. 



Talcites, D'Orb. Talc plastique. Upper Je^— Aluminous Talc, etc. No 

 fossils. Loc. Col. de la Querce, baisse de St. Veran. 



— Lower Jec? — Calcareous Talc, siliceous, compact, antimonius (serpentines, 



chloromelanite). Loc. Vallaui'is, Biot, St. Anne, Eiofredo. 



Micacites, D'Orb. Mica schists, Syenites in large masses, in thin layers or 

 schistose. Mica, black felspar with siliceous paste. Loc. Col long, St. 

 Anne, Cannes. 



Gneiss, Brechiole, red porphyry. Upper bed — Compact red porphyry : crystal- 

 line rocks. Loc. Croisette, Cannes, Esterel. 



— Middle 6^<?— Coarse Gneiss, or Gneiss with large grains, crumbling by ex- 



posiu-e to the atmosphere; white quartz. Black felspar. Loc. Mount 

 Malcontourn. 



— Lower bed—Yvas. Gneiss ; or Gneiss with fine grains, white or with black 



spots. Loc. Salese, Trinite, Borreon. 

 Azoic Period. Eocks not stratified. White snow-coloured Granite, with fine 

 grains, spotted by small dots of black felspar. Alpine type. Loc. Mount 

 Gelas, St. Martin Lantosque. 



{To be continued). 



III. — Notes on Various Species of Ctenodus found in the Low 

 Main Coal-shale, Newsham Colliery, Northumberland. 



By T. P. Barelas, F.G.S. 

 (PLATE IX., Figs. 1 and 2). 



FOE many years tlie various Coal-shales and other strata asso- 

 ciated with the Coal-seams of Northumberland have been 

 known to be rich in the remains of Plants, and the majority of the 

 specimens which are illustrated in Lindley and Hutton's elaborate 



