i895. THE PROBLEM OF THE PRIM/EVAL SHARKS. 43 



4. Fritsch, A.— "Fauna der Gaskohle, etc., Perm-formation Bohmens," vol. iii., 



pt. 2; 1893. 



5. Traquair, R. H.— " Notes on Carboniferous Selachii." Geol. Mag. [3] , vol. v., 



p. 86 ; 1888. 



6. . . — " On Psammosteus taylori, a new Fossil Fish from the Upper 



Old Red Sandstone of Morayshire." Ann. Scottish Nat. Hist., 1894, PP- 22 5> 

 226. 



7. Woodward, A. S.—" Catalogue of Fossil Fishes in the British Museum." 



Part ii. ; 1891. 



$ . . . — " The Devonian Fish-fauna of Spitzbergen." Ann. Mag. 



Nat. Hist. [6], vol. viii., pp 1-15 ; 1891. 



g .— " The Evolution of Fins." Nat. So., vol. i., pp. 28-35 ; 



1892. 



I0 ._" The Evolution of Sharks' Teeth." Ibid., vol. i., pp. 



671-675 ; 1892. 



A. Smith Woodward. 



