T1IK OLIGOCENE SKKIKS 'n I 



Orbitoides (sub-genus Orthopraymina^ and Operculina an- tin- largest 

 and most abundant form> : m-xt ii> these Alveolina is perhaps the 

 most important as a rock-builder, and in some districts the 

 MiliolidfK occur in great profusion, as in the Miliolite limestone of 

 the Paris basin, of which rock the sub-genera Triloculina and 

 Quinqueloculina are the chief components. 



KEKERENCES 



1 See "Geology of the London Basin," Mem. Geol. Survey, vol. iv. 

 (1872), and " Geology of London " (1889), both by Mr. W. Whitaker ; also 

 the smaller Guide to the Geology of London, by the same author (7th ed.). 



2 C. J. A. Meyer iu Quart. Journ. Geol. Soc. vol. xxvii. p. 74. 



3 See " Geology of the Isle of Wight," Mem. Geol. Survey, 2nd ed. (1889). 



4 J. S. Gardner in Quart. Journ. Geol. Soc. vol. xxxviii. p. 1, and Proc. 

 Geol. Assoc. vol vi. p. 88. 



8 "Bagshot Beds of the London Basin," by H. \V. Monckton, Quart. 

 Journ. Geol. Soc. vol. xxxix. p. 348 (1883). 



8 Rev. 0. Fisher in Quart. Journ. Geol. Soc. vol. xviii. p. 65. 



7 J. S. Gardner in Quart. Journ. Geol. Soc. vol xxxv. p. 209, and Geol. 

 May. for 1879, p. 153. 



8 Gardner, Keeping, and Monckton on the Upper Eocene Beds in Quart. 

 Journ. Geol. Soc. vol. xliv. p. 578. 



9 The Volcanoes of Great Britain, by Sir Archibald Geikie. 



10 A. Barker in Geol. Mag. Dec. 4, vol. viii. p. 506. 



11 J. S. Gardner, Quart. Journ. Geol. Soc. vol. xli. p. 84. 



J2 J. S. Gardner, Quart. Journ. Geol. Soc. vol. xliii. p. 270. 



13 Geol. Survey Summary of Progress for 1 900. 



14 Traite de Geologic, by A. de Lapparent, 5th ed. 1906, p. 1471. 



15 Prestwich on the " Correlation of the Eocene Strata in England, 

 Belgium, and France," Quart. Journ. Geol. Soc. vol. xliv. p. 88. 



18 See Harris and Burrows, "The Eocene and Oligocene Beds of the 

 Paris Basin " (Geol. Assoc. 1891), and G. Dollfus, Proc. Geol. Assoc. 

 vol. xxi. j>. 101. 



17 Sacco in Bull. Soc. Geol. France, for 1889, p. 212, and papers in Boll. 

 Soc. Geol. Ital. 1892, 1893, 1896. 



18 W. H. Huddleston, Geol. Mag. for 1903, p. 197, and H. Keeping, 

 Geol. Mag. for 1910, p. 436. 



19 See "Geology of the Isle of Wight," Mem. Geol. Survey (1889), and 

 Keeping and Tawney in Quart. Journ. Geol. 6V. vol. xxxvii. p. 85. 



20 See Keeping and Tawney in Quart. Journ. Geol. Soc. vol. xxxix. p. 566. 



21 J. W. Jiidd, Quart. Journ. Geol. Soc. vol. xxxvi. p. 169, and E. 

 Keeping, Geol. Mag. for 1887, p. 48. 



22 See Van der Broeck, Ann. Soc. Geol. Beige, vol. vii. p. '208 (1893). 

 21 Harris and Burrows (op. cit.) ; also G. Dollfus (op. cit. ). 



24 T. G. Bonney, " Volcanic Region of Auvergue," Proc. Geol. Assoc. vol. 

 xvii. p. 191 (1901), and " Livret Guide, " A uvergnt Geol. Congress, Paris, 1900. 

 28 Sacco, op. cit. supra. 



26 R. H. Worth, Journ. Marine Bid. Assoc. Plymouth, 1908, p. 118. 

 .). E. Marr, Pres. Address, Geol. Soc. (1906), p. Ixxxvi. 



28 Building of the British Isles, 3rd ed. p. 378 (1910) 



29 G. Maw, Quart. Journ. Geol. Soc. vol. xxiii. p. 387 (1867). 



30 A. Irving, Quart. Journ. Geol. Soc. vol. xliii. p. 378 (1887). 



