64 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 72 



E. Fraas : Netie Zeuglodonten aus dem unteren Mitteleocan von 

 Mokattam bei Cairo ; Geologische und Palaeontologische Abhand- 

 lungen, herausgeg. von Koken, vol. lo, pt. 3, 1904, pp. 199-220, 

 pis. 10-12. Protocetus and Mesocetus, later called Eocetus. 

 Abel : Les Odontocetes du Bolderien d'Anvers ; Mem. Mus. Roy. 

 d'Hist. Nat. de Belgique, vol. 3, 1905, pp. 21-25. ^^ the denti- 

 tion in the Zenglodonts. 

 Andrews : A descriptive Catalogue of the Tertiary Vertebrata of the 

 Fayiim, Egypt, 1906, pp. 235-357, pis. 20-21. Zeuglodon, Pro- 

 zeuglodon. 

 Stromer: Die Urwale (Archaeoceti) ; Anatomischer Anzeiger, vol. 

 33, 1908, pp. 81-88, pi. I. A short synopsis of the most important 

 part of the contents of the next paper. In the explanation of 

 plates the name Zeuglodon (Dorudon) osiris is used ; in the suc- 

 ceeding paper this use of "" Dorudon " is abandoned. 

 Stromer : Die Archaeoceti des Aegyptischen Eozans ; Beitr. Palaontol. 

 u. Geol. Oesterreich-Ungarns u. des Orients, vol. 21, 1908, 

 pp. 106-178, pis. 4-7. Protocetus, Eocetus, Zeuglodon, Pro- 

 zeuglodon. 

 True: The fossil Cetacean, Dorudon serratus Gibbes; Bull. Mus. 

 Comp. Zool., vol. 52, 1908, pp. 65-78, pis. 1-3. Dorudon 

 (=Doryodon) and Zygorhiza. 

 •Gidley : A recently mounted Zeuglodon skeleton in the United States 

 National Museum ; Proc. U. S. Nat. Mus., vol. 44, 1913, pp. 649- 

 654, pis. 81, 82 and text figures. 

 Kckcnodon was established by Hector (1881, /. c.) on remains 

 from Eocene strata in New Zealand. That which has been found is 

 not much else than a lot of loose teeth which show strong similarity 

 to Zeuglodon; but it is impossible to get any certain idea of the exact 

 generic relationships. Hall (Proc. Roy. Soc. Victoria, n. s., vol. 23, 

 pt. 2, 1911, p. 262) refers it to the Squalodontidae but gives no 

 reasons. 



Microzeuglodon was established by Stromer (Beitr. Palaont. u. 

 Geol. Oesterreich-Ungarns, vol. 15, 1903, p. 89) and accepted by 

 Abel (Odontocetes du Bolderien, 1905, p. 35). The basis of the 

 genus is Lydekker's Zeuglodon caucasicus (Proc. Zool. Soc. London, 

 1892, pp. 559-561, pi. 36), based on a few remains, not certainly be- 

 longing together, found in Tertiary strata in the Caucasus : a small 

 piece of a lower jaw with four cheekteeth, only two of which are 

 tolerably complete, a humerus and a caudal vertebra. The teeth are 

 serrate on both fore and hind margins of the crown. Abel referred 



