— ii8 — 



Grewkerne District, Somerset. Quart. Journ. Geol. Soc, vol lxxiv, 



n° 294, p. 143, PI. xiv-xvi. — Londres, 1919. 

 RooTHAAN (Ph.) — Petrographische Untersuchung-en in den Bergen 



den Unigebung- von Vais, Bundner Oberland. Jahresb. naturf. Ces. 



Graunbundens, lix Bd,, 19181919, pp. 69-151. — Loire, 1919. 

 RovEREio (G.) — Ancora délia zona di Vicoprimente del Savonese. Boll. 



Soc. Geol. ItaL, vol. xxxvii (1918), fasc. 2 3, p. 115. — Rome, 1919. 

 San Miguel de la Camara (M.) — Nota petrO(grafica sobre dos Diabasas 



y una Ofita de Seg-orbe (Castellon). Bol. R. Soc. esp. Hist. nat., 



t. XIX, n° 7, p. 385, i PI. — Madrid, 1919. 

 Sapper (K.) — Ueber Hornitos and verwandte Gebilde. Zeitsch. Vulkano- 



logie, Bd. v, Heft. i, 50. p., PI. i-x. — Berlin, 1919. 

 ScHALCTi (F.) — Erlauterungen ueb. Blatt Wieschs-SchafFhausen 



(n° 145). Grossherz. bad. Geol. Landes ans t., IQO p., 5 PL— Heidelberg,1916. 

 Scott (A.) - On primary Analcite and analeitzation. Trans. Geol. Soc. 



Glasg., vol. xvf, part i, 1915-16, pp. 34 45. — Dry channels in glen 



Lednock. Ibid., pp. 61-74. — Glasgow, 1916. 

 Sellards (E. h.) — Geology of Florida. Journ. Geol,, vol. 27, n" 4, 



pp. 286-302. — Chicago, 1919. 

 Sherlock (D. L.) — On the Geology and genesis of the Trefriw Pyrites 



deposits. Quart, journ. Geol. Soc, vol. lxxiv, n° 294, pp. 106-115. — 



Londres, 1919. 

 SiBLY (Th. Franklin). — The Hsematites of the forest of Dean and South 



Wales. Mem. Geol. Surv., vol. x, 93 p. — Londres, 1919. 

 Smellie(W. R ) — The igneous Rocks of Bute. Trans. geol. Soc Glasg., 



vol. XV, part m, pp. 334-373, PI. xxxvi-vii. — Glasgow, 1916. 

 Smith (R.) — Gypsum Brpccia in its relation te the Gypsum Anhydrite 



deposits of Britain. Quart. Journ. geol. Soc, vol. lxxiv, n° 295, 



pp. 174-203, PI. xvii-xviii. — Londres, 1919. — The Lake glacial 



gravels of Gorwen, Geol. mag., Dec. vi, vol. vi, n° vu, pp. 312-317. — 



Londres, 1919. 

 Stainier (X.) — La Hatchettite du Houiller du Hainaut. Bull. Soc belge 



Géol. Pal. Hijdr., vol. xxviii, 1914, pp. 123-126. — Bruxelles, 1919. 

 Stamp (L. Dudley) — The highest Silurian Rocks of the Clunforest 



District (bhropshire). Quart. Journ. Geol. Soc, vol. lxxiv, pp. 221-244, 



PI. XIX- XX. — Londres, 1919. 

 Stefanini (G.) — Echinidi cretacei e terziari de Egitto raccolti do 



Antonio Frigari-bey. Boll. Soc geol. Ital., vol. xxxvii (1918), 



fasc. 2-3, p. 121, PI. V. — Rome, 1919. 

 Stefenson (E. A.) and Johannsen (A.) — On the Accurary ot the KosiwaI 



method for the détermination of the Minerais in a Rocks. Journ. 



Geol., vol. XXVII, part 3, pp. 212-220. — Chicago, 1919. 

 Thomson (J. Allan) — Brachijpod Nomenclature: Spirifer and Syrin- 



gothyris Geol. Mag., Dec. vi, vol. vi, n° viii, pp. 371-373, n" ix» 



p. 411. — Londres, 1919. 



