Occurrence of Flint-implements in Gravel-beds. 233 



gram. They are very rudely made, without any ground surface, 

 and were the work of a people probably unacquainted with the use 

 of metals. These implements are much rarer at Abbeville than at 

 Amiens, fig. 1 being the common form at the former, and fig. 2 at 



Fig. 2. 



Fig. 1. 



Front section. 



Side section. 



Side section. 



One-third the natural size. 



Front section. 



the latter place. The author was not fortunate enough to find any 

 specimens himself; but from the experience of M. de Perthes, and 

 the evidence of the workmen, as well as from the condition of the 

 specimens themselves, he is fully satisfied of the correctness of that 

 gentleman's opinion, that they there also occur in beds of undisturbed 

 sand and gravel. 



At Moulin Quignon, and at St. Gilles, to the S.E. of Abbeville, 

 the deposit occurs, as at St. Acheul, on the top of a low hill, and 

 consists of a subangular, ochreous and ferruginous flint-gravel, with 

 a few irregular seams of sand, 12 to 15 feet thick, reposing upon an 

 uneven surface of chalk. It contains no shellSj and very few bones. 

 M. de Perthes states that he has found fragments of the teeth of the 

 elephant here. The worked flints and the bones occur generally in 

 the lower part of the gravel. 



In the bed of gravel also on which Abbeville stands, a number of 

 flint-implements have been found, together with several teeth of the 

 Elephas primigeniusy and, at places, fragments of freshwater shells. 



The section, however, of greatest interest is that at Menchecourt, 

 a suburb to the N.W. of Abbeville. The deposit there is very 

 distinct in its character ; it occurs patched on the side of a chalk 

 hill, which commands it to the northward ; and it slopes down under 



