ANNIVERSARY ADDRESS OF THE PRESIDENT. CV 



nation of beds. He gives some very interesting details respecting the 

 structure of localities, some rarely, others never previously visited by 

 geological observers, — details which require to be studied in the 

 memoir itself and with the aid of a map. An outlying portion of 

 the anthraxiferous rocks, a part of a great curved mass once con- 

 necting these rocks in the Buet with those in the valley of Chamonix, 

 was found upon the Aiguilles Rouges, there resting unconformably 

 and horizontally upon vertical beds of crystalline rocks. A section 

 of this curve, one very interesting as regards the movements of the 

 Alps, and the mode of accumulation of certain of the deposits in 

 them, is given. 



Dr. Boue read a note on the existence in the northern hemisphere 

 of isothermal curves, such as they now are, at a period at least as 

 remote as the close of the Jurassic series. In this communication he 

 noticed the observations connected with the distribution of the erratic 

 blocks in Europe and America, showing that they reached more 

 southerly latitudes in the latter than the former ; that identical fos- 

 sils of the ancient alluvions and the tertiary deposits of the two con- 

 tinents bear out the same view ; and that the same also happens 

 with the cretaceous series. Dr. Boue observes that the northern 

 limit of the nummulitic rocks, extending from Europe, by the Hi- 

 malaya, into China, describes a curve according with the present 

 isothermal lines ; thus, he remarks, if the whole earth once possessed 

 a higher temperature than at present, the same relation of climate 

 existed in the regions noticed as at present, at least back to the com- 

 mencement of the cretaceous series. 



Upon communicating a notice of the fossils of the German zech- 

 stein by M. Geinitz, M. de Verneuil adverted to the labours of Sir 

 Koderick Murchison, Count Keyserling and himself on the Permian 

 system, as established in Russia, and remarked that several of the 

 species of shells discovered by them in that country had been noticed 

 for the first time in the German zechstein, such as Murchisonia sub- 

 angulata, Solemya Biat^mica, Modiola Pallasi^ Area Kingianaf 

 Avicula Kazatiensis, Terebratula Geinitziana, T. sirperstes, Pro- 

 ductus Leplayiy and P. Cancrini. 



Notice is taken of the Orthotrix of M. Geinitz, which the author 

 considers should be separated from Productus, and which M. de Ver- 

 neuil refers (in part at least) to the Stropholosia of Mr. King, who 

 also observed sufficient differences in the so-called Pro6?wc^z of themag- 

 nesian limestone of England to lead him to this view. M. de Verneuil 

 considers that the Orthotrix Goldfussi and O. excavatus of M. Geinitz 

 are the Stropholosia Morrisiaiia and S. Sedgwicki of Mr. King. 



M. de Verneuil also read a communication by Prof. Naumann of 

 Leipsic on the deposits of Oschatz, which he assigns to the Permian 

 series, to the same effect as that brought before our Society, and 

 previously noticed, and at the same time adverted to the labours of 

 Sir Roderick Murchison in Thuringia, Saxony and Silesia in the 

 establishment of the Permian system . 



Relating to this subject M. Delahaye communicated a note on the 

 schists of Muse and Buxiere-la-Grue, which form, he considers, a 



