336 



M. ¥, L. COENET ON THE UPPER CRETACEOUS SERIES 



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sentation of an open quarry at Mes- 

 vin ; and fig. 6 represents the hori- 

 zontal section of the portion indicated 

 by the line x y. 



The following is the description of 

 this quarry : — 



A. The upper part is vegetable soil, 

 mixed with humus and yery 

 fertile. Below it is a reddish- 

 brown loam, without lime, well 

 adapted for the manufacture of 

 bricks. Occasionally small frag- 

 ments of flint are met with. 



A'. Yellow calcareous loam, sometimes 

 very distinctly stratified, and 

 often containing small rounded 

 grains of white chalk. It is 

 this deposit which Belgian geo- 

 logists designate by the name 

 of Ergeron. Occasionally, and 

 in some abundance, the foUow- 

 iug shells are found : — 



Helix hispida. 

 Pupa muscorum. 

 Succinea oblonga. 



These three species still live in 

 the locality, but the living shells are 

 of much larger dimensions than the 

 fossil. 



A^. Stratified beds of sandy loam, 

 sand, and small rolled fragments 

 of flint and of white chalk, rest- 

 ing on a pebbly mass composed 

 chiefly of debris of rather large 

 and subangular flints, mixed 

 with fragments of various Ter- 

 tiary and Devonian rocks. There 

 have been found in this depo- 

 sit, generally in the lower part, 

 numerous bones of Mammoth, 

 Ehinoceros, Ox, Horse, &c., with 

 flints worked by man. I my- 

 self have found many, amongst 

 which are several specimens of 

 a more perfect form than any 

 of the remains of human in- 

 dustry hitherto discovered in the 

 Quaternary alluvium. 



