CONTAINING FLINT IMPLEMENTS, AND ON THE LOESS. 
261 
11 : 
mixed with much-worn tertiary debris with a few older rock pebbles, and above which 
is a sandy marl. In these beds a considerable number of 
land and freshwater shells and mammalian remains were 
found. The whole is capped by a variable thickness ^ 
of Loess. The slopes of the adjoining higher ground of § 
Bicetre are bare, with the exception of occasional patches ^ £ 
of Loess. | 
No freshwater shells have hitherto been recorded from S' | 
the low-level valley-gravels of the Seine; but in April 1862 I B 
found at Sotteville * near Rouen, intercalated in the middle & <> 
of thick beds of gravel, about 10 to 20 feet above the S. 
river-level, a seam of marly sand, in which I obtained a |’ P 
few specimens of the Limnoea jperegra and opercula of the S' 
Bythinia tentaculata ; and at Paris I discovered in the hard * * ~ 
concreted gravel of the Petite Rue de Reuilly, and about § § 
O 3 CQ 
30 to 40 feet above the Seine, 8 o 
Limncea peregra, L. truncatula, Valvata piscinalis, Zualubrica; 
whilst at Clichy I found, low down in the gravel contain- 
ing, I am informed by M. Lartet, the Elephas jprimigenius 
and' E. antiguus, three specimens of the Limncea jperegra. 
All these specimens are entire and uninjured. In this 
latter locality M. Lartet had also recently found a very 
perfect ovoid flint implement of the Abbeville type. 
In the high-level gravel of Gentilly have been found f — 
Pisiclium amnicum. 
Valvata piscinalis. 
Bulimus. 
Limnoea. 
Hydrohia. 
Helix. 
On the north side of the Seine, thick gravel-beds extend 
from the river to the base of the hills, and some distance 
up their slopes, as shown at the canal de l’Ourcq and in 
the pit in the Petite Rue de Reuilly. As the tertiary 
strata again come to the surface a short distance further 
on, it is probable that this bed of gravel, like that on the 
south of the Seine, abuts or slopes rapidly up against their 
escarped edges. At Charonne, about a mile beyond the 
last-named pit, and near the Barriere du Trone, there are 
several pits of sand and gravel, containing numerous land 
in n; 
* M. l’Abbe Cochet states that there are in the Museum at Rouen two flint implements of the St Acheul 
type said to have been found in these pits, op. cit. p. 8. 
f Op. cit. p. 297. M. Duval does not give the specific names in his list. Few specimens are now to be found. 
Section across the Valley of the Seine East of I 
