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9. 1845. Gh. Lykll. Travels in North America I p. 257—258. 



10. 1845. X. G Zimmefmann. Brief an den Geheimrath v. Leonhard. 



Neues Jahrb. f. Min. p. 73. (The here described walrus skull 

 from the subsoil of Hamburg seems to have been carried 

 there by man; Communications of Prof. G. Gottsche). 



Giebel. Fauna der Vorwelt. I. p. 232. 



Ahassiz. Proceed. Amer. Assoc, f. the Adv. of science, p. 

 252, 348. 



Eichwald. Lethaea rossica. 3. p. 890. 



Bronn. Lethaea geognostica. Thl. 6. p. 786. 



Pictet. Paleontologie I. p. 233. 



J. Leidy. Notice on the Remains of the fossil walrus on the 

 coast of the United States. Transact. Phil. Soc. Philadelphia 

 New Series, vol. XI. p. 83. 



Gratiolet. Bull. Soc. géol. de France. 2e série. V. 



P. Gervais. Zoölogie et Paleontologie francaise. He éd. p. 275. 



E. Ray Lankester. On the Sources of the Mammalian Fauna 

 in the Red Crag and on the Discovery in that Deposits of 

 a new Mammal, allied to the Walrus. Proc. Geol. Soc. XXI. 

 p. 233-232. 



20. 1867. Vicomte du Bus. Sur quelques mammifères du Crag d'Anvers. 



Hull. Acad. roy. Belgique. 2e serie 24. p. 562—577. 



21. 1869. J. Leidy. The extinct Fauna of Dakota and Nebraska Journ. 



Acad. Nat. Science of Philadelphia VII. p. 416. 



22. 1869. Le Hon. L'Homme fossile. p. 304. 



23. 1871. P. J. v. Beneden. Les Phoques de la mer Scaldisienne. Bull. 



Acad. roy. Belgique. 2e série 32. p. 5 — 18. 



24. 1876. I'. J. v. Beneden. Les Phoques du bassin d'Anvers. Bull. Acad. 



roy. Belgique. 2e série T. 41. p. 783—812. 



25. 1S76. Schaafhausen. Trichechus rosmarus in Coin. Sitz. Ber. 



Niederrh. Ges. f. Natur- und Heilk. S. 427. 

 P. J. v. Beneden. Description des ossements fossiles des environs 



d'Anvers I. Pinnipedia Ann. Musée d'Hist. Nat. de Belg. T. I. 

 W. Davis. On a collection of pleistocene Mammals, dredged 



off the Eastern Coast. Geol. Mag. (2). V. p. 97. 98. 

 E. T. Newton. Notes on the Vertebrata of the preglacial Forest 



Beds of the Coast, of England. Geol. Mag. (2). VII. p. 152 — 159. 

 E. Ray Lankester. On the Tusks of the fossil Walrus found 



in the Red Crag of Suffolk. Transact. Linn. Soc (Zoology) 



(2). II. p. 213—221. 

 J. A. Allen. History of North American Pinnipeds U. S. Geol. 



Survey Miscellaneous Publications 12. 

 E. Ray Lankester. Journ. Linn. Soc. (Zoology) XV London, 



p. 144—146. 

 E. T Newton. The vertebrata of the pliocene Deposit of 



Britain. Mem. Geol. Surv. of the United Kingdom, p. 17 — 18 

 K. Zittel. Handb. d. Palaontologie IV p. 680—685, 

 Trouessart. Catalogus Mammalium p- 375—376. 



