I05 



NOTES AND COMMENTS. 



GEOLOGICAL SURVEY MAPS. 



In the ' Geological Magazine ' for January, Mr. Bernard 

 Hobson draws attention to the penny-wise policy recently 

 adopted by the Treasury of increasing the cost of the hand- 

 coloured geological survey maps. For instance, quarter sheet 

 92 N.-E., Pateley Bridge, has been raised in price from 3/- 

 to 14/3 ; and quarter sheet 81 S.-E., Buxton, from 3/- to 8/3. 

 * This means that while thousands of pounds are spent in 

 geological surveying, the results are inaccessible to the public 

 except at an almost prohibitive price. It makes British 

 geologists envy th^ir friends in the United States, where the 

 antediluvian hand-colouring is unknown, and a geological 

 folio containing topographical geological economics, and struc- 

 tural map with explanation, can be bought for twenty-five cents 

 (i/-). In Canada geological maps are supplied gratis ta 

 Canadians.' 



CAVE REMAINS FROM WARTON CRAG. 



At a recent meeting of the Geological Society of London^ 

 Mr. J. Wilfrid Jackson described his excavations at Dog Holes,. 

 Warton Crag. The cave is situated on the western side of 

 Warton Crag, and opens on a sloping ' pavement ' of limestone^ 

 It owes its origin to the erosion of a series of master-joints in the 

 Carboniferous Limestone. The present entrance is by a vertical 

 drop from the general level of the ' pavement,' and is un- 

 doubtedly of secondary origin, due to the falling-in of the 

 weakened roof of one of the passages. The specimens found 

 were derived from the cave-earth below the surface-soil in one 

 of the chambers of the cave. They comprise a large series of 

 small vertebrates, including Rodents, Insectivores, Amphibians,. 

 Birds, etc. Among the Rodents are some interesting forms,, 

 the chief of which are the Arctic and Norwegian Lemmings,, 

 and the Northern Vole. A large series of non-marine Mollusca 

 was found along with these remains, one species being of 

 particular interest, namely Pyramidula ruder at a, only known 

 in this country by its fossil remains in Pleistocene deposits. 

 The Pleistocene age of the remains is fully discussed, as well as. 

 their possible mode of origin through a former swallow-hole. 

 In many respects the cave and its contents bear a striking 

 resemblance to the famous Ightham Fissures. 



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1910 Mar. I. 



