RECENT ADVANCES IN SCIENCE 395 



KlDSTON, R., Cantrill, T. C, and DlXON, E. E. L., The Forest of Wyre and 



the Titterstone Clee Hill Coalfields, Trans. Roy. Soc. Edin. 19 17, 51, pt. 4, 



999-1084. 

 MACNAIR, P., The Hurlet Sequence in the East of Scotland, and the Abden Fauna 



as an Index to the Position of the Hurlet Limestone, Proc. Roy. Soc. Edin. 



1 91 7, 37, pt. 2, 173-208. 

 KlDSTON, R., and Lang, W. H., On Old Red Sandstone Plants showing Structure, 



from the Rhynie Chert Bed, Aberdeenshire. Part I. Rhynia Gwynne-Vaughani , 



Kidston and Lang, Trans. Roy. Soc. Edin. 19 17, 51, pt. 3, 761-84. 

 Horne, J., The Discovery of Silicified Peat Beds in the Scottish Old Red Sand- 

 stone, Scott. Geogr. Mag. 19 17, 33, 385-92. 

 REED, F. R. C, The Ordovician and Silurian Brachiopoda of the Girvan District, 



Trans. Roy. Soc. Edin. 1917, 51, pt. 4, 795-998. 

 Grabau, A. W., Comparison of American and European Lower Ordovician 



Formations, Bull. Geol. Soc. Amer. 1916, 27, 555-622. 

 Raymond, P. E., Expedition to the Baltic Provinces of Russia and Scandinavia, 



Part I. Correlation of the Ordovician Strata of the Baltic Basin with those of 



Eastern North America, Bull. Mus. Comp. Zool. Harvard, 191 6, 56, No. 3, 



179-286. 

 Twenhofel, W. H., Part II. The Silurian and High Ordovician Strata of 



Esthonia, Russia, and their Faunas. Part III. An Interpretation of the 



Silurian Section of Gothland, ibid. 289-354. 

 Green, J. F. N., The Age of the Chief Intrusions of the Lake District, Proc. Geol. 



Assoc. 191 7, 28, 1-30. 

 Tomlinson, C. W., The Middle Palaeozoic Stratigraphy of the Central Rocky 



Mountains Region, Journ. Geol. 1917, 25, 112-34, 244-57, 373-94. 

 RANSOME, F. L., Some Palaeozoic Sections in Arizona and their Correlations, 



United States Geol. Survey, Prof. Paper 98-K, 1916, 133-66. 

 Bailey, E. B., The Islay Anticline (Inner Hebrides), Q.J.G.S. 1917, 72, pt. 2, 



132-64. 

 Noble, L. F., and Hunter, J. F., A Reconnaissance of the Archaean Complex 



of the Granite Gorge, Grand Canyon, Arizona, United Slates Geol. Surv. 



1916, Prof. Paper 98-I, 95-113. 

 Dresser, J. A., Part of the District of Lake St. John, Quebec, Geol. Surv. Canada, 



1 91 6, Memoir 92, pp. 88. 

 Heron, A. M., The Geology of North-Eastern Rajputana and Adjacent Districts, 



Geol. Survey of India, 1917, Memoirs, 45, pt. 1, pp. 128. 



Again this quarter a very large amount of stratigraphical 

 work has come to hand. Arber finds that while the South 

 Staffordshire Coalfield agrees closely in its palseobotanical 

 horizons with that of Warwickshire, the productive measures of 

 each field, as well as those of the Welsh borderland fields, 

 originated in separate basins. The higher red unproductive 

 measures of the Keele and Enville Series are found to be con- 

 tinuous over the whole of these areas, and are believed to be of 

 Stephanian rather than of Middle or Upper Permian age. 



Macnair's work on the limestone horizons in the Lower 

 Limestone Series of the Scottish Carboniferous has now been 



