part 3] PLEISTOCENE DEPOSITS AROUND CAMBRIDGE. 20!) 



from the Lower Molluscan Bed on the Downing Site, of which 

 tlic section will be described later: — 



Valvata piscinalis Miiller. i Sphseri/wm cornewm Limm. 



Hygromia hispida Linim. Pisidvwm anmicv/m Miiller. 



Corbicula fluminalis Miiller. Pisidium henslowianwm Sheppard. 



I may here note that the basal gravel of these Corbicula-beairing 

 ibeds of the Downing Site contained many boulders, chiefly of flint; 

 but one large mass of Gault (shown in the section, p. 225) was 

 found, and many of Chalk-Marl. Jurassic boulders also occurred, 

 and one igneous rock. A boulder of quartzose rock 9x6x4 inches 

 had phosphate-nodules attached to it, and has been washed into 

 "the gravel from the Cambridge Greensand. 



In the old collections from the pits near Barnwell Abbey are 

 some plants which may have come from these beds, but unfor- 

 tunately they tell us nothing. They were examined some years 

 ago by the late Mr. Clement Reid, who says that all the leaves 

 that are determinable seem to belong to. one species of Salix, 

 apparently S. repens. 



A few words concerning worked Hints which may have come 

 from these beds may be added. 



Certain artefacts have been obtained from the deposits of the 

 * Highest Terrace' which I believe to be of Upper Palaeolithic date 

 and to have been derived from deposits newer than the Corbicula-* 

 Beds. These will be noticed later. 



Those to which I would refer as possibly out of the Corbicula- 

 Beds are of Lower Palaeolithic type, and probably all Chellean. 



A large coup-de-poing from Barnwell, described by Mr. A. 

 F. Griffith, 1 was presented by him to the Sedgwick Museum. 



An implement obtained by the Rev. O. Fisher from Chesterton 

 is mentioned by Sir John Evans. 2 This is also in the Sedgwick 

 Museum. It is a small worn oval implement with orange surface. 

 The position in Chesterton in which it was found is not recorded. 



In the same Museum are two other implements of the coup-de- 

 poing type. One is labelled as from a heap of gravel in Mill Road, 

 "brought from Chesterton in 1879. The other was obtained by a 

 workman in the Milton -Road Gravel-Pit in 11)12, and stated to 

 have been found 6 feel below the surface. Both of these are much 

 waterworn. 



Two implements of the coup-de-poing type, labelled Chesterton, 

 are preserved in the Museum of Ethnology, but nothing seems to 

 be known about the circumstances of their discovery. 



A well-trimmed brown Hake 5 inches long was purchased from a 

 Cambridge dealer by Mr. J. Reid Moir, who presented it to the 

 iSedgwick Museum. It was stated by the dealer to have been found 

 on the site of the Catholic Church in Hills Road, a spot which is 



1 Geol. Mag. dec. 2, vol. v (1878) p. 400. 



- ' Ancient Stone Implements of Great Britain ' 2ml ed. (1897) p. 538. 



