570 Reports and Proceedings — Geological Society of London. 



to the Congratulatory Address submitted to her, on the occasion of 

 the Sixtieth Anniversary of her Accession, by the Pi"esidenfc, Council, 

 and Fellows of the Society. 



The Secretary announced that Lady Prestwich had presented to 

 the Society a half-length portrait, in oils, of the late Sir Joseph 

 Prestwich, painted by Mr. W. E. Miller. 



Mr. W. W. Watts proceeded to give details of some interesting 

 geological features recently exposed at the new Sewerage Works at 

 Carshalton, Surrey, now being made by the Urban District Council, 

 to which the attention of tlie Society had been directed by the 

 Surveyor during the autumn recess. 



These excavations are situated at a spot which on the Geological 

 Survey Map is coloured as London Clay ; and the features of the 

 ground fully justified this colouring. The excavations, however, 

 have shown that there are loamy and sandy beds of a light-yellow 

 colour, some 14 or 15 feet in thickness, and apparently occupying 

 a hollow in the London Clay. At the base these sandy beds become 

 dark and clayey in some places, and include flints and pebbles, 

 while below this is the London Clay. In the dark pebbly layer 

 were found a large skull, a piece of a tusk, and a number of smaller 

 bones, which Mr. E. T. Newton has determined to be a piece of 

 elephant tusk, the skull (31 inches long) of Bhinoceros antiquitatis 

 with some of its limb bones ; while the smaller hones represent two 

 or perhaps three horses. Although the teeth of the rhinoceros are 

 wanting, the skull is otherwise very perfect ; and, bearing this in 

 mind, as well as the fact that certain of the limb bones were also 

 found, and that Elephas is represented by the tusk, and all three (it 

 is said) at a depth of 14 or 15 feet, little room is left for doubting 

 that we have here at Carshalton a Pleistocene deposit of a somewhat 

 unusual character and at a spot where it was not before suspected. 



Mr. Whitaker, who was responsible for the geological mapping of 

 this district, pointed out how the general configuration of the district 

 gave no clue to the presence of this deposit of loamy sand, which 

 occurred on a gentle slope, and that even now it was only possible 

 to mark it on the map as an oval patch round the excavations with 

 uncertain boundaries. The Drift shown, moreover, differs from that 

 of the neighbourhood in that the latter is essentially gravel, while 

 the former is sand, with loamy beds, but, as a rule, not stony, so that 

 there are no surface indications of gravel. 



The mammalian remains are now preserved in the Museum of 

 Practical Geology through the kindness of the District Council. 



Lieutenant-General McMahon, V.P.G.S., having taken the chair, 

 the President made a communication regarding very similar deposits 

 to those above described occurring in North- Western Middlesex. 

 Some years ago he described sections in Glacial Drift on tbe Hendon 

 plateau exposed during sewerage operations. More recently the 

 sewers have been carried on at lower levels between Hendon and 

 Edgware, and numerous remains of the mammoth and rhinoceros 

 have been found resting on an eroded surface of London Clay, and 



