NO. 8 INTERRELATIONSHIPS OF THE CETACEA WINGE 



6i 



(Denkschr. k. Akad. Wissensch. Wien, math, -naturw. Kl., vol. 90, 

 p. 221) : 



Die StJimme der Wale. 

 I. Mystacoceti (auct.) II. Delphinoceti (nov.) III. Squaloceti (nov.) 



(Bliitezeit im Pliocan.) (Bliitezeit in der Gegenwart.) (Bliitezeit im Miocan.) 



Balaeno- Rhachia- Balae- 

 pteridae nectidae nidae 

 A A 



Delphinidae Physete- Ziphii- Surhino- Platani- 

 ridae dae delphidae stidae 



Creodontia. 



(To the AcrodelphidcE are referred, among the hving genera, Del- 

 phinapterus and Monodon, Inia and Pontoporia.) 



True's paper On the Classification of the Cetacea (Proc. Amer. 

 Philos. Soc., Philadelphia, vol. 47, 1908, pp. 384-391) is mostly an 

 account of the opinions which Abel had expressed in 1905, with some 

 objections and some assent. 



To cetaceans both recent and fossil have been given various generic 

 names in addition to those which appear in the present article. These 

 names are partly well known as synonyms of others ; but partly the 

 corresponding animals are so slightly known that no certain opinion 

 can be had about them. References to all the names theretofore used 

 for cetaceans are found in Trouessart, Catalogus Manjmalium tam 

 viventium quam fossilium, 1897-99, with supplement, 1904-5, and in 

 Palmer, Index Generum Mammalium, 1904; many names are also 

 to be found in Beddard, A Book of Whales, 1900; detailed references 

 to the North American fossil genera are due to Hay, Bibliogr. and 

 Catal. of the fossil Vertebrata of North America, Bull. U. S. Geol. 



