342 Dr. Marr & Miss Gardner—Pleistocene Beds, Barnwell. 
occurrence, quite apart from the low level, which is in itself of no 
great significance, is in favour of their reference to one of the latest, | 
if not the latest stage, of the Pleistocene deposits of the district. 
In addition to the plants the peaty seams have furnished several 
remains of insects, and-the following shells, which are all of species — 
recorded by Mrs. Hughes from the beds of the pit: Planorbdis 
sprrorbis, Succinea oblonga, Helix hispida, and Pupamarginata. Others 
will no doubt be added when the deposits are worked in greater 
detail. 
No mammalian bones have yet been found in the peaty material, 
but Mrs. Hughes records Cervus elaphus, Elephas primigenius, Equus 
caballus fossilis, and Rhinoceros leptorhinus or tichorhinus from the 
pit. We have recently obtained the horse, the mammoth, the 
reindeer (Cervus tarandus), and an ilium of Rhinoceros tichorhinus. 
These were determined by Mr. C. E. Gray, the First Attendant in 
the Sedgwick Museum. We are satisfied that these bones came 
from the pit, though obtained from workmen. These workmen 
offer for sale various objects from the gravel and Gault, and in no 
case has any attempt been made to dispose of objects clearly brought 
from elsewhere. 
Since writing the above we have found among the bones deposited 
in the Sedgwick Museum fragments of antler collected from this pit 
in 1888, which are recorded on Mr. Gray’s authority as Cervus 
tarandus. 
No worked flints of any importance have yet been found. A flake 
with platform and bulb may have been derived. In any case it gives 
no clue as to age, and we may make the same remark about half 
a dozen spalls (flakes) with bulbs which have been picked up. 
The occurrence of the base of the Pleistocene deposits of this pit at 
a depth of about 6 feet below the surface of the alluvium of the 
Cam which abuts against them is a fact of considerable importance. 
As the base of the gravel further south is some feet above the surface 
of the alluvium and is falling northwards, the existence of a deeper 
buried channel below the alluvium is probable, and receives support 
from a section figured by Professor Hughes in the paper cited 
(fig. 26) and from the accompanying account of the deposits. He: 
states that ‘‘ the Jesus College gravel with mammoth runs to a depth 
of some 30 feet below the lower end of Maid’s Causeway” to which 
the alluvium extends. These Jesus College gravels occur under 
similar conditions to those at Barnwell Station, which is only a mile 
distant down the river. They are therefore probably of the same 
age, and it is certain that in each of these two sections we have 
Pleistocene deposits below the level of the surface of the modern 
alluvium. The actual centre of the channel may well lie further 
under the alluvium, and extend to a greater depth below its surface 
than the 30 feet recorded in the case of the Jesus College gravel. 
The situation of our plant-bearing deposits therefore recalls that of 
the Arctic Plant Bed of the Lea Valley described by Mr. 8. Hazzledine 
Warren (Quart. Journ. Geol. Soc., vol. lxviii, p. 218, 1912, and 
vol. Ixxi, for 1915, published 1916, p. 164. . 
In the case of the Lea Valley deposits, the lowest terrace in which 
