252 



T. Damdson — Continental Geology. 



blage of sj^ecies bearing a particular and well-marked stamp, as may 

 be seen by a glance at Professor Suess's admirable monograph, " Die 

 Bracbiopoden der Stramberger ScTiichten," as well as at those by 

 Zettel, etc., on other classes. 



In connection with this subject of the difficult classification of the 

 rocks above mentioned, M. Lory, a distinguished French geologist, 

 favourably known on account of his able researches in the geology 

 of the French Alps, etc., has kindly transmitted to me a summary of 

 his recent labours which he communicated on the 3rd of May to the 

 Geological Society of France, and of which I now offer a translation 

 prior to introducing M. Pictet's valuable observations upon the same 

 subject. I have, moreover, considered it absolutely necessary to 

 introduce the discussion in connection with the T. viator limestone 

 of the Port- de-France and that of Stramberg, as they are so in- 

 timately connected with the fossils to be assigned to the Cretaceous 

 period. 



Comparative SEaxJENCE from the Gatjlt to the Oxford Clay. 

 By M. C. Lory. 29th April. 



Megion of the Central Jura. 



(Type situated between Besan9on and 

 Neufchatel.) 

 Gault. 

 Marls, -with Flicatula placunea. 



Marls, witli Orbitolines, Salenia pres- 



tensis, etc. 

 Limestone, with Pterocera pelagi. 



Limestone, with Chama Ammonia, 

 Yellow Limestone of Neufchatel. 



Subalpine Region. 



(Type neighbourhood of Grenoble.) 



Gault. 



Aptien Marls, with Belemn. semicanali- 



culatus, etc. 

 C Marls, with Orbitolines and Echinus of 



Eimet (Isere). 

 Limestone, with Chama Lonsdalei. 

 Marls, with Orbitolines (1st zone) and 



with Seteraster oblongus, etc. 



Limestone, with Chama ammonia. 



Neocomien Marls, or Marls of Hauterive. < 



'Marls, with Toxaster complanatus. 

 Limestone, with Crioceras Buvalii. 

 Limestone, with chloritic grains (glaucon- 

 ieux), with Belem. pistilliformis and di- 

 latatus, 

 Eusset Brown Limestone, with Ostrea ( Russet brown Limestone, with Ostrea 



rectangularis. \ rectangularis. 



Valanginian Limestone. Limestone of Fontanil (Isfere). 



f Marls, with Belemn. laius, Am. Neoeomi- 



ensis, etc. 



Argilo-bituminous Limestone, with hy- 



draiilic cement : Fauna of Berrias (No. 



5 of M. Pictet). 



Limestone and Breccia of Aizy (No. 3 and 



4, id.). 

 Limestone, with Terebratula janitor (No. 

 , 2, id.). 



(Break.) 



Fresh-water beds. Suprajurassic (Pur 



beck ?) 

 Portland Limestone. 

 Marls and Limestone, with Ostrea vir- " 



gula. 

 Marls and Limestone, with Pterocera 



(Break.) 

 >Correspondingtoacomplete change of fauna 



Marls and Limestone, with Astarte. 

 Limestone, with Diceras. Coral Eag. 



