[1915-19-] 



286 



TWENHOFBL W. H., 3. Expedition to the Baltic Provinces of Russia and 

 Scandinavia, 1914. Part 2. — The Silurian and High Ordovician Strata 

 of Esthonia, Russia, and their Faunas. Part 3. — An Interpretation of 

 the Silurian Section of Gotland. Bull. Mus. Comp. Zool. lvi. pp. 287— 

 354, fig. [diagram], & pis. i— v [geol. map]. 1916. 



-4. Granite Boulders in ( ?) the Pennsylvanian Strata of Kansas. Am. 



Journ. Sci. ser. 4, xliii. pp. 363—380, figs, [outline-maps]. 1917. 



-5. The Silver City Quartzites : a Kansas Metamorphic Area. Bull. 



Geol. Soc. Am. xxviii. pp. 419—430, figs. [maps]. 1917. 



6. The Chert of the Wreford and Foraker Limestones along the State 



Line of Kansas and Oklahoma. Am. Journ. Sci. ser. 4, xlvii. pp. 407- 

 429, fig. 1919. 



7. Additional Facts Relating to the Granite Boulders of South-eastern 



Kansas. Ibid, xlviii. pp. 132-135. 1919. 

 8. Pre-Cambrian and Carboniferous Algal Deposits. Ibid, xlviii. pp. 



339-352, figs. 1919. 



. See also AYhitaker, W. A. 



TWITCHELL, M. W. See Clark, W. B., 3. 

 TYLOR, Sir E. B. Obit.— See Anox., 88. 



TYRRELL, G. W. The Bekinkinite of Barshaw (Renfrewshire) and the 

 Associated Rocks. Geol. Mag. dec. 6, ii. pp. 304-311, 361-366. 1915. 

 And A.C. 



2. The Geology of the Glasgow District. III. — The Petrology of the 



District. Proc. Geol. Assoc. xxvi. pp. 170-174. 1915. 



3. . VI.— The Kilpatrick Hills. Ibid. p. 178. 1915. 



4. — — . XII.— XTauchline and Lugar. Ibid. pp. 188-189. 1915. 



5. On the Boundary between the Upper and Lower Divisions of the 



Red Rock Series near Whiting Bay and in the Sliddery Water, Arran. 

 Trans. Geol. Soc. Glasgow, xv. pp. 188-199, figs. [geol. sections] & pi. 

 xxvi. 1915. And A.C. 



6. The Picrite-Teschenite Sill of Lugar (Ayrshire) and its Differentia- 

 tion. Abs. Proc. G. S. 1915-16, pp. 55-57.' 1916; & Q.J.G.S. lxxii. 

 pp. 84-129, figs. [geol. maps & sections] & pis. x-xi. 1916. 



7. The Petrographv of Arran. 3. — Pitchstone Xenoliths in Basalt 



Dvke, Dippin, Arran. Geol. Mag. dec. 6, iii. pp. 193-196. 1916. And 

 A.C. 



8. Fvu'ther Xotes on the Petrography of South Georgia. Ibid. pp. 435— 



441. 1916. And A.C. 

 9. The Trachytic and Allied Rocks of the Clyde Carboniferous Lava- 

 Plateaus. Proc. Roy. Soc. Edinb. xxxvi. pp. 288-299. 1916. 

 10. The Whangie and its Origin. Scot. Geogr. Mag. xxxii. pp. 14-24, 



figs. 1916. And A.C. 

 11. The Petrologv of South Georgia. Trans. Roy. Soc. Edinb. 1. pp. 823- 



835, pi. xciv. 1916. And A.C. 

 ■ 12. Some Tertiary Dvkes of the Clyde Area. Geol. Mag. dec. 6, iv. 



pp. 305-315, 350-356, figs. 1917. 

 13. The Igneous Geology of the Cumbrae Islands, Firth of Clyde. Trans. 



Geol. Soc. Glasgow, xvi. pp. 244—274, figs. [geol. plans]. 1917. 

 14. A Contribution to the Petrography of Benguella, based on a Rock 



Collection made by Professor J. W. Gregory. Trans. Roy. Soc. Edinb. 



li. pp. 537-559, pi." i. 1917. And A.C. 

 15. Additional Xotes on the Petrography of South Georgia. Geol. Mag. 



dec. 6, v. pp. 483-489. 1918. 

 ■ . See also Gregory, J. W., 38. 



TYRRELL. J. B. Artesian Water in Manitoba. Canadian Engineer, xxvi. 



p. 574. 1914. A.C. 

 2. The Occurrence of Gold in Ontario. Trans. Inst. Mining cO Mctall. 



xxiii. pp. 143-154, fig. 1914. And A.C. 

 3. Gold on the Xorth Saskatchewan River. Bull. Canad. Mining Inst. 



1915, pp. 68-81. 1915. A.C. 



-—4. Xote on the Geology of Porcupine. Ibid. pp. 397-398. 1915. A.C. 



5. Pre-Cambrian Golclfields of Central Canada, Proc. ct- Trans. Roy. 



Soc. Canada, ser. 3, ix. sect. iv. pp. 89-118, fig. & pis. i-ii. 1915. And A.C. 

 6. Presidential Address to the Royal Society of Canada, Section IV, 



1916. Xotes on the Geology of Xelson and Hayes Rivers. Ibid. x. 

 sect. iv. pp. 1-27, figs, [plans] & pis. i-vi. 1916. And A.C. 



7. Gold-Bearing Gravels of Beauce County, Quebec. Trans. Am. Inst. 



M. E. li. pp. 672-683, fig. [section]. 1916. And A.C. 



