37° SCIENCE PROGRESS. 



17. BROGGER, W. C. Die Silurischen Etagen 2 und 3. Chris- 



tiania, 1882. 



18. Tullberg, S. A. Skanes Graptoliter, I. Sver. Geol. Under- 



s'dkn, ser. C, No. 50 (1882). 



19. Lapworth, C. On the Geological Distribution of the Rhab- 



dophora. Ann. and Mag. Nat. Hist., ser. 5, vol. Hi. 



(1879). 



20. Schmidt, F. On the Silurian (and Cambrian) Strata of the 



Baltic Provinces of Russia. Quart. Jour. Geol. Soc, vol. 

 xxxviii., p. 514 (1882). 



21. KAYSER, E. Neues JaJirbuch, fur Mineral, etc., bd. i., p. 179 



(1889). 



22. Ussher, W. A. E. On the Devonian Rocks of South Devon. 



Quart. Jour. Geol. Soc., vol. xlvi., p. 487 (1890). 



23. KAYSER, E. Fauna der altesten Devonbildungen des Harzes. 



Abh. d. preuss Geol. Laudesaustalt (1878). 



24. Frech, F. Ueber das Devon des Ostalpen. Zeitsch. des 



Deutsch. Geol. Gesellsch. (1887). 



25. Barrois, C. Recherches sur les Terrains Anciens des Asturies 



et de la Galice, 1882, pp. 465-518. 



26. WILLIAMS, H. S. Report of the Sub-Committee on the Upper 



Palaeozoic. Geol. Congress Compte Rendu de la fyne Session, 

 Londres, 1888 (1891). Appendix A, p. 121. 



27. De KONINCK, L. G., and LOHEST, M. Notice sur le Paralle'l- 



isme entre le Calcaire Carbonifere du nord-ouest de l'Angle- 

 terre et Celui de la Belgique. Bull, de V Acad. Roy. de 

 Belgique, 3me ser., t. xi., No. 6 (1886). 



28. Lapworth, C. The Girvan Succession. Quart. Jour. Geol. 



Soc, vol. xxxviii., p. 537 (1882). 



29. Lapworth C. On the Ballantrae Rocks of the South of Scot- 



land and their place in the Upland Sequence. Geol. Mag., 

 Dec. III. vol. vi., No. 3, pp. 20 and 59. 



30. HlNDE, G. J. Notes on Radiolaria from the Lower Palaeozoic 



Rocks of the South of Scotland. Ann. and Mag. Nat. 

 Hist., p. 40 (1890). 



31. LAPWORTH, C. The Secret of the Highlands. Geol. Mag., 



Dec. II. vol. x., No. 2, pp. 120, 193, 337 (1883) ; and The 

 Close of the Highland Controversy. Geol. Mag., Dec. III. 

 vol. ii., No. 3, p. 97 (1885). 



32. Peach, B. N., Horne, J., etc. Report on the Recent Work 



of the Geological Survey in the North-west Highlands. 

 Quart. Jour. Geol. Soc, vol., xliv., p. 378 (1888). 



33. BROGGER, W. C. Ueber die Bildungsgeschichte des Kristia- 



niafjords. Nyt. Mag.Jor Naturv., 30 te bind (1886). 



