280 THE NATURAL HISTORY RETIEW. 



sketch of the geology of the Peak Downs Eange, in Queensland. He 

 concluded by referring to his large collection, sent to England some 

 time ago, and now in the Bath Philosophical Institution, for further 

 evidence of the age of the Coal-beds of New South Wales, which 

 he believes to be as old as those of Europe. 



2. " On the Drift of the East of England and its Divisions." By 

 S. V. "Wood, jun., Esq., E.G.S. 



In this paper the author divides the Drift of the country extend- 

 ing from Elamborough Head to the Thames, and from the Sea on 

 the East to Bedford and Watford on the "West, as follows : — a, the 

 Upper Drift, having a thickness of at least 160 feet still remaining 

 in places, b and c, the Lower Drift, consisting of an Upper series 

 (b), having a thickness from 40 to 70 feet, and a Lower series (c^, 

 with a thickness, on the coast near Cromer, of from 200 to 250 feet, 

 but rapidly attenuating inland, c comprises the Boulder-till, and 

 overlying contorted Drift of the Cromer coast, which along that line 

 crop out from below h a few miles inland, c also, in an attenuated 

 form, ranges inland as far south as Thetford, and probably to the 

 centre of Suffolk, cropping out from below I by Dalling, Walsingham, 

 and Weasenham, and appearing at the bottom of the valleys of 

 central Norfolk, b consists of sands, which on the east coast overlie 

 the Ehivio-marine and Eed Crag, but change west and south into 

 gravels, which pass under a and crop out again on the north, south, 

 and centre of ISorfolk, and west of Suffolk and Essex, extending 

 (but capped in many places by {a) over most of Herts. T-he Upper 

 Drift {a) consists of the widespread Boulder-clay, which overlaps 

 h, for a small space, on the south-east in Essex, and again at Horse- 

 heath, near Saffron Walden, but overlaps it altogether on the north- 

 west, resting on the secondary rocks in Huntingdonshire and Lin- 

 colnshire. The distribution of b indicates it as the deposit of an 

 irregular bay, afterwards submerged by the sea of a, which over- 

 spread a very wide area, a now remains only in detached tracts, 

 having been extensively denuded on its emergence at the beginning 

 of the post-glacial age, so that wide intervals of denudation (sepa- 

 rating the tracts) indicate the post-glacial straits and seas which 

 washed islands formed of «. The author considers the so-called 

 Norwich Crag of the Cromer coast as not of the age of the Eluvio- 

 marine Crag of Norwich, but as an arctic bed forming the base of c, 

 into which it passes up uninterruptedly. The author regards the 

 beds b as identical with the fluvio-marine- gravels of Kelsea, near 



