Regionale Geologie. 



-227- 



Gregory, H. E. : Geology of the Navajo Country, a reconiiaissance of 

 parts of Arizona, New Mexico and Utah. (U. S. Geol. Surv. Prof. 

 Pap. 93. 1917. 161 p. 34 Taf. 3 Flg.) [Ref. Amer. Journ. (4.) 45. 

 145. 1918.] 



Twenhofel, W. H. : The chert of the Wreford and Foraker Limestones 

 along the state-line of Kansas and Oklahoma. (Amer. Journ. of Sc. 

 (4.) 47. 407—429. 1919.) 



Mac Kenzie, J. D. : Geology of Graham Island, British Columbia. (U. S. 

 Bureau of Mines, Bull. No. 88. 221 p. 2 Kart, 16. Taf. 23 Fig. 1916?) 



Südamerika. 



Maury, Carlotta J.: A Contribution to the Paleontology of Trinidad. 

 (Journ. Äc.^Nat. Sei. Philad. (2.) 15. p. 25— 112. Mit 9 Taf. Philadelphia 

 1912.) 



Bowman, J. : The Audes of Southern Peru. 336 p. 204 Fig. New York 

 1916. [Ref. Amer. Journ. (4.) 43. p. 416. 1917 ] 



Afrika. 



l>u Toit, A. L. and A. W. Rogers: The geology of Past of the 

 Transkei. (Geol. Surv. S. Africa, Cape Sheet. 27. 1917. 32 p. gr. Karte.; 

 IRef. Amer. Journ. (4.) 45. 146. 1918.] 



