108 



REPORTS ON THE STATE OP SCIENCE. 



Geological Institute of Louvain, has just completed an exhaustive 

 examination of Caninia patala and Caninia cylindtica. 



LILLE 

 O 



TOWNAI 



\AntOing 



Atfi 

 O 



OBRUSSELS 



tc3vssincs ^ 



O O Sii, 



flluy-Aiycennes •$)[ 



N 



1 



L 



r 



Ave sues 



Comblgm du Pont 



PLACE MAP. 

 Scale or Miles 



Notes on Localities (see Place Map, above). 



I. Tournai and Ecaussines : Visdan absent. 

 At Tournai : — 



All the quarries are in the Upper Tournaisian and exhibit 

 Z-y, capped by Caninia beds of C x age (i.e., beds containing Can. 

 cylindrica, accompanied by Can. patula and Can. cornucopice). 

 The change of phase above Z-y probably took place at slightly 

 different times at different points, e.g., at Allain and Vaulx, but 

 as yet the knowledge of ranges is not sufficient to detect 

 the variation. 

 Near Ath and Ecaussines : — 



The base of the Carboniferous rests upon the transition beds 

 (considered to be uppermost Devonian), and contains the charac- 

 teristic ft fauna. 



The Upper Tournaisian exhibits the same zonal range as at 

 Tournai — namely, Z-y, capped by Goninw-beds of C x . 



II. Namur Basin (Valley of Sambre and Meuse) : the Orneau, 

 Namur, Huy. 



Ascending sequence. 



Transition beds followed by /3. 



Dolomitisation obscures the sequence up to S t ; certain levels, 

 however, such as y-G 1 , and C 2 with Prod, sublazvis, have been 

 carefully followed by Mr. Delepine. 



Sj, both faunally and lithologically, is practically identical 

 with the same level in the Bristol area. 



In S 2 , Lithosirotion enters later than in Britain. 



The ' pseudo-breccia ' with Prod, undijerus occurs at the top 

 of S 2 , and is apparently a little earlier than the true ' Grande 

 Breche ' of the Dinantian. 



