142 Correspondence — T. Crook. 



2. That long preniaxillse are usually correlated with an occiput 

 of the B. primigenius type, while short premaxilloe are usually 

 correlated with, an occiput of the B. acutifrons type. 



3. That polled black Galloway cattle and polled white ' wild ' 

 Cadzow cattle are intimately related to the TJrus, that flat-polled 

 Aberdeen-Angus cattle probably include amongst their ancestors an 

 ancient Oriental race now represented by, amongst others, a Syrian 

 breed with rudimentary horns, and that round-polled cattle may 

 belong to a still more ancient Oriental race descended from B. acutifrons 

 of the Punjab Siwaliks. 



OOEEESPOITDEMCE. 



LATEEITE IN BEITISH GUIANA. 

 Sir, — I notice with regret that there are several typist's errors in 

 the last part of my laterite paper. Some uncorrected pages of type- 

 script appear to have been sent to you in place of the corrected ones 

 which I have here. The errors are all in the December Number, 1910. 



Page 559, line 20, read it for them, 

 p. 559, 1. 27, read tropics for Indies, 

 p. 560, 1. 18, insert the nature before of which, 

 p. 560, 1. 38, read alluvial for alkaline. 

 p. 560, 1. 41, read and is resistant for which is resistant. 

 p. 561, footnote, 1. 2, read rocks for rock. 



p. 561, footnote, 1. 5, insert boiled between recently and distilled. 

 p. 561, footnote, 1. 13, delete then, 

 p. 561, footnote, 1. 14, read and for or in. 

 p. 561, footnote, 1. 16, read experiment for experiments. 

 p. 561, footnote, 1. 18, read showed the action for show it. 

 p. 562, 1. 2, read silica for silicate, 

 p. 562, 1. 3, read into for with. 

 I regret that these slips should have occurred in my MS. 



J. B. Harrison. 

 Science and Agriculture Department, 

 Georg-etoavn, Demerara, British Guiana. 

 January 6, 1911. 



HIGH-LEVEL SHELLY GRAVEL. 



Sir, — With reference to my letter in the Geological Magazine for 

 January, and a reply by Mr. Lamplugh in the February number, 

 I hasten to assure Mr. Lamplugh that I have never regarded him as 

 a "docile" glacialist. On the other hand, I have long been duly 

 impressed with his restiveness ; and if the phrase "docile glacialist " 

 is to some extent a contradiction in terms, Mr. Lamplugh is quite 

 justified in claiming that he has clone his best to make it so. 



I must, however, reassert my statement that the ' land-ice ' 

 glacialists, including himself, have advocated a conception of glacier- 

 progression which is quite inadequate to explain the transportation of 

 gravel to high levels. If I may again state this crude conception 

 briefly, it is that the front of the ice-sheet is pushed bodily uphill, 

 carrying morainic material with it. The fact that this has been seen 



