EUROPE, 67 



The Upper Landenian is represented near Lille by the sands of Ostri- 

 court, the equivalents of the Bracheux sands. The clay of Flanders, 

 which is the Lower Ypresian of Dumont, is divided into two horizons 

 (the clay of Orchies and the clay of Ilonbaix),= Guise sands of the Paris 

 basin and also= London Clay. The author admits the term "clay of 

 Flanders," but notes that it corresponds exactly to the Suessonian of 

 D'Orbigny. G. A. L. 



GossELET, Prof. J. Etudes relatives an bassin houiller du Nord de la 

 France. [Coal-basin of the N. of France.] Bull. Soc. Geol. France, 

 3 ser. t. i. pp. 409-417, 6 figures in text. 

 As the result of researches in the Boulonnais, the author proves, on 

 paloeontological grounds, that some of the beds which Prof. Prestwich 

 regarded as Carboniferous Limestone in reality belong to the Coal 

 Measures. According to M. Gosselet, the same succession of the Car- 

 boniferous rocks obtains in the Boulonnais as in Belgium. The fact 

 that at Hardinghem the pits are sunk through Carboniferous Limestone 

 before reaching the coal, was formerly explained by the author on the 

 hypothesis of a reversed dip. This, however, has been disproved ; and 

 he now believes in the existence of a fault, bringing the Coal Measures 

 into contact with the Carboniferous Limestone, and having an extremely 

 oblique or nearly horizontal hade. 



The second part of the paper consists of an inquiry into the strati- 

 grapliical relations of the Devonian rocks bordering the Carboniferous 

 regions of Belgium and the north of France. Exception is taken to the 

 universal application of Prof, llamsay's conclusions with regard to the 

 inland origin of red rocks, but not to the special cases which called 

 them forth. G. A. L. 



. De I'extension des couches a Nummulites Icevigata dans lo 



Nord de la France. [Extension of the NummuUtes-lcemgata beds 

 in the N. of France.] Bull. Soc. Geol. France, 3 ser. t. ii. pp. 51— 

 59, pi. iii., 3 figs, in text; abstract, under a different title, in 

 Ann. Soc. Geol. Nord, 1870-74, p. 36. 



From a study of the Nummulites-lcevigata beds, which he considers 

 to have been weathered in place, the author confirms M. Hebert's sur- 

 mise, that at the time of their formation the inland sea of the Paris 

 basin communicated with the Flemish sea, running across the entire 

 length of the Department of the Nord. To this paper M. de Lapparent 

 adds a note, in which he argues, on chemical grounds, that the siliceous 

 grit in which the Nummulites are found is not the original matrix in 

 which they were deposited, which ho says was a clay. G. A. L. 



. Sur Page des silex, dits Rahots de Mens. [Age of the flints, 



known as liabots, at Mens.] Bull. Soc. G^ol. France, 3 ser. t. ii, 



pp. 59, GO, and (under a different title) Ann. Soc. Geol. Nord, 



1870-74, p. 36. 



The author identifies, on palsDontological grounds, the flint beds of 



Mens and Obourg with the Ammonites- Br onyniarti zone of the Chalk 



f2 



