4 



Ajy/rs (i)id C^ontnti'ii/s. 



holocrystalline and hypabyssal o(iui\alcnts of tlu' Honowdalc 

 Lavas, and the anthor is of opinion that tlu^\' also arc of 

 Ordovician age. 



ESKDALE AND WASDALE GRANITE. 



The Eskdale and Wasdale Granites (d) are mnch more acid, 

 and show httle sign of alteration, except that due to weathering 

 and dislocation. The}' are undoubtedly intrusive into the 

 Borrowdale Series, but seems to be pre-Triassic. Thus the 

 intrusion is probably Devonian, like the neighbouring granite 

 of Shap, which, with the exception of its large phenocrysts 

 of orthoclase, is not dissimilar to some of the varieties of the 

 Eskdale Granite. The basic intrusions (c) have been examined 

 only where they come into proximity to the granite. They 

 ma}' well be connected with the great Tertiary basic flows of 

 Antrim, as has been suggested by Mr. Harker. The granite 

 becomes progressively more and more acid as its margin is 

 approached, until, in some places, the percentage of silica 

 amounts to 96.16. This is explained by the assumption that 

 the magma, as a whole, was more acid than the eutectic mixture 

 of quartz and orthoclase, and that consequently the excess of 

 silica separated in the marginal portions, which were the first 

 to solidify. 



GEOLOGY OF HARROGATE. 



A second edition of the ' Geology of the Countr\^ north 

 and east of Harrogate,' prepared by Mr. C. Fox-Strangways, 

 has just been published by the Survey, and we should like to 

 congratulate both the Survey and Mr. Fox-Strangways upon 

 the general excellence of the work. It is also illustrated in a 

 way which is quite refreshing for a government publication — 

 the reproductions of photographs by Mr. Godfrey Bingley 

 being very fine indeed. There is also a coloured geological 

 map of the district. 



After dealing in detail with the various^beds in the area, 

 there are chapters on the physical structure, economic geology, 

 the Harrogate springs, etc., the last being of particular value. 

 There are appendices devoted to well-sections and bibliography, 

 both of which are carefully compiled, and unusually complete. 



YORKSHIRE ZOOLOGISTS. 



The Vertebrate Section of the Yorkshire Naturalists' Union 

 recently held a most successful meeting- at Leeds, which extended 

 Irom early in the afternoon until late in the evening-. Mr. Riley 



Naturalist, 



