26 GEOLOGY. 



lately made near Mold, in which a similar order of beds was found ; 

 but here the white clay rested on Coal Measures. He believes the clay 

 to be of freshwater origin. W. T. 



Mackintosh, D. Scotch Granite on Welsh Hills. Geol. Mag. dec. 2, 



vol. i. p. 95. 

 Asks for information regarding the reported occurrence of Scotch 

 granite on the Welsh mountains up to 2000 feet above the sea. 



. Glaciation of West Somerset. Geol. Mag. dec. 2, vol. i. 



pp. 334, 335. 



Eeferring to Mr. Lucy's paper (see p. 25) the author states that the 

 supposed glacial grooves on the banks of the Exe are due to weathering. 

 He then refers to the curved-back slaty laminae which are common in 

 West Somerset, and which he believes to have been produced by the 

 passage of land-ice. He remarks upon the absence of striated surfaces 

 south of a line drawn from the mouth of the Tees, past Ickley, to Hope 

 Mountain, near Wrexham. W. T. 



. On the Traces of a Gteat Ice-sheet in the Southern Part 



of the Lake District, and in North Wales. Quart. Journ. Geol. 

 Soc. vol. XXX. jjp. 174-179 (map). 



A tabular statement of the ice-ttiarks is given. The author believes 

 that the primary striae must have been produced by an ice-flow capable 

 of ignoring the drainage of the country to a much greater extent than 

 could have resulted from any system of confluent glaciers strictly so 

 called. The movement of the ice-sheet is inferred to have been from 

 about N.N.W. to S.S.E. 



The striated and mammillated rocks near Snowdon are described. 

 The author believes that they indicate an ice-sheet travelling to the 

 south and south-east. W. T. 



. Additional Remarks on Boulders, with a particular refer- 

 ence to a Group of very large and far-travelled Erratics in Llanar- 

 mon Parish, • Denbighshire. Quart. Journ. Geol. Soc. vol. xxx. 

 pp. 711-721. 

 The boulders occur on plateaux 1300 and 1800 feet above the sea, 

 and are of great size, considering the distance they have travelled along 

 lines of dispersion crossing the drainage of the country, and running 

 up sloping ground, the largest being at the limit, some occurring at a 

 height of 1900 feet. C. E. De R. 



Mann, E. Geological Expedition to Atherstone and Nuneaton. 



Eep. Rugby School Nat. Hist. Soc. for 1873, pp. 19-22. 

 Notices sections of Millstone Grit, with intruded greenstone. 



Mansell-Pleydell, John C. Flora of Dorsetshire .... with 

 Sketches of its Geology and Physical Geography. Pp. 5-27. (Map 

 of Districts founded on River-drainage.) 



The same as the paper in Geol. Mag. vol. ^. pp. 402, 438 (1873). 

 " Drainage" is also treated of, pp. 27-32. 



