29 [i 92 1.] 



DOWLING, D. B., 3. Underlying Seams of the Souvis Coal Field, Southeastern 



Saskatchewan. Summ. Rep. Geol. Surv. Canada, 1920, pp. 26b-29b. 1921. 

 4. The Possibilities of the Oil Resources of Canada. Trans. Roy. Canada 



Inst. xiii. pp. 39-47, figs. 1921. 

 5. The Turtle Mountain Coal Measures. Trans. Roy. Soc. Canada, ser. 3, 



xiv. Sect. 4, pp. 35-43, figs. 1921. 

 DRAPER, D. The High-Level Diamond-Bearing Breccias of Diamantina, Brazil.. 



Trans. Geol. Soc. S. Afr. xxiii. pp. 43-51, figs. [geol. sketch-maps], pi. i. 1921 ; 



& Mining Mag. xxiv. pp. 372-375, fig. 1921. 

 DRESSER, J. A. Granitic Segregations in the Serpentine Series of Quebec. Trans.. 



Roy. Soc. Canada, ser. 3, xiv. Sect. 4. pp. 7-13. 1921. 

 DREYERMANN, E. Die Ahnenreihe des Pferdes und ihre Bedeutung fur die 



Abstammungslebre. JBer. SencTcenberg. naturf. Gesellsch. xiv. pp. 169-170. 



1914. 



2. Geologische Exkursionen in der Umgegend von Frankfurt a. Main. I. — 



Elorsheim. Ibid. 1. pp. 95-103, figs. [geol. sketch-maps]. 1920. 

 3. Die neueren Dinosaurierfunde und ihre Bedeutung fur die Wissenscbaft. 



[Abstract.] Ibid. pp. 164-165. 1920. 

 4. Das Werden unserer Heimat im Laufe der Erdgeschichte. Ibid. li. 



pp. 1-10, figs. [geol. map]. 1921. 

 DREYER, L. Wilhelm Kobelt (1840-1916). [Obit,] Jahrb. nassatdsch. Ver. 



JS~aturk. lxix. pp. xxviii-xliii, portrait. 1916. 

 DRYGALSKI, E. vox. Das Eis der Antarktis und der Subantarktischen Meere.. 



Deutsche Sudpolar-JExpedition, 1901-1903, i. Geographic, pp. 365-709, figs. 



pis. xv-xxxvi. 1921. AndA.C. 

 DUBOIS, G. Le Lemming a Collier a Maubeuge. Ann. Soc. geol. Nord, xliv.. 



pp. 69-81, figs. pi. i. 1920. 



■ 2. Le Spermophile du Quaternaire de Cambrai. Ibid. pp. 82-89. 1920. 



3. Arvicolides et Leporides du Quaternaire de Cambrai. Ibid. pp. 90-98. 



1920. 



4. Remarques sur la Loutre des Tourbieres de la Region du Nord de la France.. 



Ibid. pp. 100-103. 1920. 

 5. Note complementaire sur le Lemming a Collier du Quaternaire de Maubeuge^ 



Ibid. pp. 103-106. 1920. 

 6. Notes sur quelques Caracteres physiques et chimiques de la Craie lourde de 



l'Artois a Inoceramus brongniarti. Ibid. pp. 164-179, fig. 1920. 

 DUCIE, Earl of. Obit— See Anon., 30. 



DUENAS, E. I. Informe sobre el Reconocimiento Geologico-Minero de la Cuenca 

 Carbonera Setentrional Lima-Junin. JBol. Ing. llinas, Peru, no. 97, pp. 1-293, 

 pis. i-xvi [geol. sketch-map]. 1919. 



DUN, W. S. The Development of the Mineral Industry of the State. [Presidential 

 Address.] Joum. Roy. Soc. JST.S.W. I'm. pp. 12-28, tig. 1919. 



. See also Benson, W. N., 2. 



DUNBAR, C. O. New Species of Devonian Fossils from Western Tennessee.. 



Trans. Connect. Acad, xxiii. pp. 109-158, pis. i-iv. 1920. 

 ■ ■ . See also Schuchert, C, 4. 



DUN STAN, B. Mica in Australia. Mining Mag. xxiv. p. 120. 1921. 

 DUPARC, L., & G. Favre. Sur la Tectonique et le Minerai de Fer d'Ain- 



Babouche (Algerie). C. R. Soc. Phys. Geneve, xxxviii. pp. 83-87. 1921. 

 DUPLESSIX, E. Le Champ de Fractures de Martigne-Ferchaud. Bull. Soc. geol.. 



Bretagne, i. pp. 69-78, fig. 1920. 



2. Du Traitement de la Stibine. Ibid. pp. 93-105. 1920. 



DU TOIT, A. L. The Geology of Pondoland and Portions of Alfred and Lower 



Umzimkulu Counties, Natal. Geol. Surv. S. Afr. JExpl. Cape Sheet 28, 



pp. 1-44. 1920. 



2. The Karroo Dolerites of South Africa: a Study in Hypabyssal Injection. 



Trans. Geol. Soc. S. Afr. xxiii. pp. 1-42, figs. 1921. 

 3. Discussion on Mr. F. A. Steaet's paper, 'Some Notes on the Geology of 



the Western Portion of the Natal Coalfield.' Proc. Geol. Soc. S. Afr. xxiii.. 



p. xxxv. 1921. 



4. Discussion on Dr. P. A. Wagner's paper, 'Note on the Volcanic Origin 



of the Salt Pan on the Farm Zoutpan, No. 467.' Ibid. pp. xl-xlii. 1921. 



5. Reply to Discussion on ' The Karroo Dolerites of South Africa.' Ibid... 



p. xliii. 1921. 



. See also Rogers, A. W., 2. 



DWERRYHOUSE, A. R. The North of Ireland during the Glacial Period... 

 [Abstract.] Rep. Sf Proc. Belfast Nat. Hist. Soc. 1919-20, pp. 1-3. 1921. 



