464 Bibliograpliy : Geology and Palceontology , igoi. 



J. R. Dakyns. York Mid. W. and S.W. 



Origin of Coal [describes the geological structure of parts of 



Yorkshire, and briefly refers to its bearing- on the discussion on the 



'Origin of Coal' which took place at the Bradford Meeting- of the British 



Association]. Geol. Mag., March 1901, p. 135. 



J. R. Dakyns. York S.E. 



Cheviot Porphyrites in the Boulder-clay of East Yorkshire [Letter 



confirming the opinion expressed by Mr. Stather that many of the East 



Yorkshire Porphyrites have been derived from the Cheviots]. Geol. 



Mag., March 1901, p. 143. 



Charles Davison. Lanc. S. 



On the British Earthquakes of 1900 [describes the effect of the 



'Doubtful earthquake' at Pendleton, near Manchester, on ylh April 1900]. 



Geol. Mag., Aug. 1901, pp. 358-362. 



J. Dickinson. Lanc. S. 



Notes on Castle Irwell, Pendleton, Manchester. Trans. Manch. 

 Geol. Soc, Vol. 27, 1901, pp. 161-162. 



J. Dickinson. Lanc. S. 



Notes on the Geological Survey of Manchester. Trans. Manch. 

 Geol. Soc, Vol. 27, 1901., pp. 133-135. 



G. DuNSTON. See 'A. Wilson.' 



A. R. DWERKVHOLSE. YORK MiD W. 



The Movements of Underground Waters of Craven. First Report 



of the Committee [Interim report read at the British Association Meeting 

 at Bradford]. Geol. Mag., Feb. 1901, pp. 72-75; also Rep. Brit. Assn. 

 (Bradford), 1900 (publ. 1901), pp. 346-349. 



Gertrude L. Elles and Ethel M. R. Wood. Lake District. 



A Monograph of the British Qraptoiites. Part 1. Dichograptida^, 



pp. 1-54, PI. L-IV. [describing fifteen species of Didyntogmpfus from the 

 Skiddaw Slates, of which two, viz., D. imifonnis and D. si'/nithu/s are 

 new]. Palasontogr. Soc, 1901, Vol. 55. 



H. T. Foster. York S.W. 



Geology of the Thorncliffe District, South Yorkshire [describing 



especially the several coal-seams, mostly belonging to the Middle Coal- 

 Measures]. Brit. S. Mining- Students' Journ., \'ol. z^f 1901, pp. 69-77. 

 Archibald Geikie. Northern Cointies. 



Summary of Progress of the Geological Survey of the United 



Kingdom for 1900, pp. i.-vii. + 1-181, 1901. 

 W. Gibson. Cheshirk. 



On Rapid Changes in the Thickness and Character of the Coal- 



Measures of North Staffordshire [briefly refers to the synclinal of cofil- 

 measures beneath the Cheshire plain]. Geol. Mag., F"eb. 1901, pp. 79-80; 

 Rep. Brit. Assn. (Bradford), 1900 (publ. 1901), pp. 743-744. 



Walcot Gibson. Nottinghamshire. 



On the Character of the Upper Coal-measures of North Stafford- 

 shire, Denbighshire, South Staffordshire, and Nottinghamshire; and 

 their relation to the Productive Series. Quart. Journ., Geol. Soc, 

 Vol. 57, 1901, pp. 251-266 ; Abstract in Geol. Mag., May 1901, pp. 237-238. 



Edward Greenly. York S.E. 



Recent Denudation in Nant Ffrancon, North Wales [briefly refers 



to the effect of the waterspout on the chiilk at Langtoft, in East Yorkshire]. 

 Geol. Mag., Feb. 1901, pp. 68-69. 

 A. Greenwell. Derbyshire. 



The Derbyshire Chert-Mining Industry. Quarry, Vol. 6, 1901, pp. 24, 



27, 28, and 31. 



Naturalist. 



