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ROTHPLETZ, A. Ueber die systematische Deutung und die stratigraphische 

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ROTHROCK, A., & J. B. Shumakee. A Comparison of Dolomites. Chemical 



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 ROTMAN, D. See Meazec, L. 



BOUX-BRAHIC, J. Les Gites Miniers et leur Prospection. Pp. i-xxviii, 1-842, 



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 ROVASENDA, L. di. Obit.— See Sacco, F., 20. 



ROVER ETO, G. Studi di Geomorfologia Argentina, IV— La Pampa. Boll... 



Soc.geol. ital. xxxix. pp. 1-48, figs., pis. i-iii. 1920. 

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pt. 1, pp. 155-159. 1920. 

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mento continuato, e non secondoCicli ripetuti. Atti R. Accad. Lincei, Rendic. 



ser. 5, xxix. pt. 2, pp. 154-157. 1920. 

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ROXO, M. G. de 0. Resume of the Preliminary Note on the Gericino Eruptive 



Centre. Pp. 1-6. figs. 8vo. Rio de Janeiro, 1920. A.C. 

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ROZLOZSXIK. P. Vorlaufiger Bericbt fiber die Art des Auftretens der Bauxite 

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RUFFER, Sik Aemaxb. See Fouetae, R., 2. 



RUNDALL, W. H. The Manganese Deposits of Tcbiaturi, Caucasus. Mining 



Mag. xxiii. pp. 150-155, figs. 1920. 

 RUSHTOX 7 , A. Notes on the Lancashire Coal Field. Coll. Guard, cxix. p. 590. 



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RUSSELL, A. On the Occurrence of Phenacite and Scbeelite at Wheal Cock, 



St. Just, Cornwall. Mm. Mag. xix. pp. 19-22, figs. 1920. 

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Fused Lead from the Wreck of the Fireship ' Firebrand' in Falmouth Harbour, 



Cornwall. Min. Mag. xix. pp. 64-68, figs. 1920. 

 RUSSELL, I. C. Obit.— See Lane, A. C. 



RUSSELL, P. G. The Coals of Sexton Creek and the Tributaries of South Fork 

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. See also Beowning, I. B. 



RUSSO, P. L'Eocene phosphate et les Couches a Turritelles du Tadla (Maroc 

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2. Les Terrasses alluviales del'Oum er Rbia (Maroc occidental). C. R. Acad. 



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RUTOT, A. Un Essai de Reconstitution plastique des Races bumaines primitives. 

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RYBA, F. Obit.— See Kettnee, R., 3. 



RZEHAK, A. Eine alttertiare Foraminiferenfauna von Pollau in Mahren. VerJi. 

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SABATINI, V. Osservazioni sulle Lave leucitiche del Vulcano di Roccamonfina. 



Atti R. Accad. Lincei, Rendic. ser. 5, xxix. pt. 1, pp. 191-194. 1920. 

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 SABOT, R. La Methode de Fedoeoff et son Application a la Determination des 



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SACCO, F. Gita alia Serra dTvrea. L'Esciirsionista, Torino, 1915, pp. [1-4],. 

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