Correspondence — R. Bullen Newton. 143 



of the Ice Age succeeding the maximum glaciation, flowed north-east 

 from Strathmore (Strathmore Ice), and of those left by the ice which, 

 after the final or partial disappearance of the Strathmore Ice from 

 the district, passed over the Dee watershed and brought with it a 

 characteristic " granite drift " (Dee Valley Ice). Striation (E. 32° S.) 

 due to the latter ice was recorded from Beltcraig, near Portlethen. 

 Many peculiar valleys (glacial overflow channels) were noticed, the 

 largest being the gorge through which the Caledonian Eailway 

 runs for fully a third of the distance between Drumlithie and 

 Stonehaven Stations. 



It was pointed out that at Stonehaven, as at Aberdeen, no beach 

 deposits referable to the 100 ft. submergence have ever been 

 observed, but that there is strong evidence in favour of the existence 

 of a pre-glacial rock platform (now overlaid by glacial deposits) at 

 a level of 75 to 100 feet above O.D. 



3. "Notes on River Development in the East-Central Highlands." 

 By Dr. Bremner. 



Many instances of rearrangement of drainage in the East-Central 

 Highlands were noted, and it was proved that in Sheets 64 and 65 

 there occurs no authentic case of recent (post-glacial) river capture ; 

 in particular, capture of the Slugain by the Quoich was shown to be 

 pre-glacial. (See also Scottish Geographical Magazine for November, 

 1915.) 



The complicated history of the River Muick was traced in some 

 detail. By successive captures, its headwaters (Allt an Dubh Loch) 

 have been diverted from their original course down Glen Mark so as 

 to enter the Dee (1) by way of the Girnock Burn and the wind-gap 

 west of the Coyles of Muick, (2) by way of the present lower Muick. 



The dismemberment of the original Tarf (Sheet 64) by the Bruar, 

 Tromie, and Edendon, and possibly by the Mhaire, was also discussed. 



CORBESPONDEITCE. 



FOEAMINIFEEAL LIMESTONES FEOM NEW GUINEA. 



Sut, — When reviewing the literature on some Foraminiferal lime- 

 stones from New Guinea, during the preparation of a paper published 

 in May last as No. 20 of a series of " Reports on the Collections 

 made by the British Ornithologists' Union Expedition and the 

 Wollaston Expedition in Dutch New Guinea, 1910-13 ", issued in 

 1916, I regret having overlooked an important contribution to the 

 subject by my friend Mr. Frederick Chapman, the palaeontologist 

 of the National Museum at Melbourne, entitled " Description of 

 a Limestone of Lower Miocene Age from Bootless Inlet, Papua" 

 (Journ. Proc. Roy. Soc. New South Wales, vol. xlviii, pp. 281- 

 301, pis. vii-ix, 1914-15). The forms of Foraminifera referred toby 

 Mr. Chapman are almost identical with those mentioned in my report 

 as occurring in the limestones of Mount Carstensz, and, moreover, 

 the stratigraphical results are exactly similar in each case. It is 



