Correspondence — R. M. Brydoie. 189 



in the part witli which we are now concerned is about that of the 

 other country in lat. 64° N., and its watershed (though the snow- 

 parting may have been somewhat east of this) is roughly 80 miles 

 from the west coast. In the Antarctic during that 300 miles journey 

 southwards from Mount Erebus, Captain Scott's party was travelling 

 almost parallel with a mountainous region (generally within a few 

 leagues) ranging from 8,000 to 12,000 feet in height, and their 

 view to the south when they turned back was blocked by a snowy 

 mass nearly as high as Monte Rosa. The mean temperature also 

 in the Antarctic is much lower than we are entitled to assume for 

 Scandinavia in the Glacial Epoch {Ice Work, pt. iii, ch. i; the 

 probable minimum limit may be inferred from the statements on 

 p. 237). There are other difficulties, such as the relative sizes of 

 Scandinavian and British ice-sheets, the transport and distribution 

 of boulders, the materials of British drifts and their arrangement, 

 which will have to be considered; but the main one for our present, 

 purpose is the inadequate ' ramming ' power of the ice from the 

 Scandinavian upland, because by far the greater part of the journey 

 to England would have been over land, not by floating on water. 

 Assuming a lower strand-line increases our difficulties, and a materially 

 higher one will submerge more or less of England. 



T. G. BONNEY. 

 Cambridge. 



March 15, 1909. 



THE TRIMINGHAM CHALK— SOUTH BLUFF. 

 SiK, — I have recently been convinced tliat the northern part of 

 the blufE is continuous under the sand with the southern part, and 

 in fact offers a section of the greater part of the ' sponge beds ' 

 and of some of the succeeding beds. This was first suggested by 

 the presence of the four-angled variety of Serpida canteriata, whose 

 known range is otherwise so rigidly restricted to the ' sponge beds ' 

 and immediately succeeding beds. Polio wing up this clue, I saw 

 that the very ill-defined lower flint lines of the northern part could 

 be read into accurate correspondence with the flint lines which 

 even in the admirable horizontal section of the ' sponge beds ' 

 afforded by the foreshore are not over well defined, while one of 

 the principal hardened beds on the foreshore coukl be identified in 

 the bluff. I also saw that the main face of the northern part gave 

 a section practically along the axis of the main fold, while the dips 

 in the southern part, from which I argued in 1900 that if the two 

 parts were continuous Ostrea lunata chalk must appear within reach 

 in the northern part, were taken from sections parallel with the 

 axis of the fold but some way down its side. This and a local 

 increase in the rate at which the fold rises, Avhich was shown by 

 the recently cleared end of the southern part, would carry the 

 0. lunata chalk of the southern part well out of reach in the 

 northern part, but I judged from the upper fiint lines that if I was 

 correctly identifying the 'sponge beds', 0. lunata chalk should 

 come in at the highest point, and I was able to get near enough 

 to the highest point to scoop away a little chalk in which I found 



