60 Dr. C. I. Forsyth-Major — Table of Contemporary Deposits — 



Thus I take it that Prestwich would have classed the gravel- 

 bed 2 in the above section as Westleton Beds, and its composition 

 and appearance favour the view that it does belong to the gravels 

 which Prestwich assigns to that series in this part of England. 



North. South. 



Diagram- Section in the Ayot Brickfield. 

 Level of surface nearly 400 feet O.D. 



I. Boulder-clay, about 12 feet shown, containing pebbles of chalk, etc. 

 II. Stratified gravel and sand ("Westleton). 

 III. London Clay. 



lY. Loamy sand — Basement Bed, London Clay. 

 N.B. — The junction of beds 2 and 3 was hidden by talus. The section is drawn 

 from a rough sketch and was about 30 feet in depth. 



A short examination showed that it is composed mainly of flint 

 pebbles, derived no doubt for the most part from the wreck of 

 Tertiary pebble-beds ; subangular flints are fairly common, as also 

 are quartz pebbles. I noticed several pebbles of whitish quartzite, 

 one of which measured 5 inches in longest diameter. The gravel 

 was clearly stratified. 



Assuming, therefore, that we have here the Westleton Beds of 

 Prestwich, the point to which I wish to draw attention is the manner 

 in which the section illustrates their relation to the Chalky 

 Boulder-clay. This sufficiently appears from the above sketch. 

 The Boulder-clay rests against the Westleton Bed in the north of the 

 pit, but has cut through it on the south, and lies directly on 

 London Clay. A very similar section on the railway between 

 Chappie and Mark's Tey is given by Prestwich, fig. 7, at p. 132 

 of the paper mentioned above. 



V. — Note on a Table of Contemporary Geological Deposits 



ARRANGED StRATIGRAPHICALLY, WITH THEIR CHARACTERISTIC 



Genera of Mammalia. 



By Dr. C. I. Forsyth-Major, Corr. Memb. Zool. Soc. Lend. 



THE subjoined list of characteristic genera of Mammalia has been 

 compiled, at the request of my friend Dr. Henry Woodward, 

 for the purpose of being used as a descriptive Table to be fixed on 

 the wall of the Mammalian Gallery in the Geological Department of 

 the British Museum (Natural History), and has been arranged in the 

 form which was thought to be most suitable for the purpose. 



I have only a few remarks to offer with regard to some points in 



