126 U.S. NATIONAL MUSEUM BULLETIN 2 46 



512 [extract of previous article]. — Scheffer and Rice, 1963, U.S. Fish 

 and Wildlife Serv., Spec. Sci. Rep., 431 : 8 [regarded valid as a sub- 

 genus; included species: densirostris, ginkgodens, layardi, stejnegeri]. 



Mesoplodon Gervais, 1850, Ann. Sci. Nat., Paris, (3), Zool., 14: 16 (line 

 26) [type species: Delphinus sower bensis Blainville (=Physeter bidens 

 Sowerby), by original designation and monotypy]. — Flower, 1878, 

 Trans. Zool. Soc. London, 10: 415 [taxonomic revision]. — Forbes, 

 1893, Proc. Zool. Soc. London, 1893: 216 [development of mesorostral 

 bone; taxonomy].— True, 1910, Bull. U.S. Nat. Mas., 73: 3 [tax- 

 onomy]. — Harmer, 1924, Proc. Zool. Soc. London, 1924: 541 [tax- 

 onomic review; Paikea Oliver regarded as a synonym]. — Kellogg, 1928, 

 Quart. Rev. Biol., 3: 61 [history; relationships]. — Winge, 1942, Inter- 

 relat. Mam. Gen., 3: 306 [characters; classification]. — Orr, 1953, 

 Journ. Mammal., 34: 239 [review of species]. — Nishiwaki and Kamiya, 

 1958, Norsk Hvalf.-Tid., 47: 440 [revision].— McCann and Talbot 

 1964, Proc. Linn. Soc, 175(2): 137 [characters; species in South 

 African waters]. 



Mesodiodon Duvernoy, 1851, Ann. Sci. Nat., Paris, (3), Zool., 15: 41 

 [included species: Mesodiodon Sowerbyi Duvernoy (type = Delphinus 

 sowerbensis Blainville =Physeter bidens Sowerby), Mesodiodon micropterum 

 (= Delphinus micropterus Cuvier =Physeter bidens Sowerby), Mesodiodon 

 densirostre (= Delphinus densirostris Blainville), Mesodiodon longirostre, "que 

 est le ^iphices [sic] longirostris de Cuvier [fossil]"]. 



Mesiodon Gray, 1866, Cat. seals and whales Brit. Mus., p. 349 [mis- 

 spelling of Mesodiodon Duvernoy, 1851]. 



Diplodon Gray, 1866, Cat. seals and whales Brit. Mus., p. 349 [mis- 

 spelling of Dioplodon Gervais, 1850]. 



Dolichodon Gray, 1866, Cat. seals and whales Brit. Mus., p. 353 [subgenus 

 of J^iphius Cuvier; type species: ^iphius layardii Gray, by monotypy]. 



Callidon Gray, 1871, Ann. Mag. Nat. Hist., (4), 7: 368 [type species: 

 Mesoplodon Giintheri Krefft ( = £iphius layardii Gray), by monotypy]. 



Neoziphius Gray, 1871, Suppl. cat. seals and whales Brit. Mus., p. 101 

 [type species : Neoziphius europaeus Gervais (= Dioplodon europaeus Gervais), 

 by monotypy]. 



Oulodon von Haast, 1876, Proc. Zool. Soc. London, 1876: 457 [type 

 species: Mesoplodon grayi Haast, by monotypy]. — Von Haast, 1877, 

 Trans. New Zealand Inst., 9: 450 [characters]. 



Type species: Delphinus sowerbensis Blainville (=Physeter bidens Sowerby), 

 by monotypy. 



Distribution: In the eastern Atlantic: from Norway and the British 

 Isles to the Madeiras, the Mediterranean, and off the coast of South 

 Africa; in the western Atlantic: from Newfoundland, Canada, into the 

 Caribbean to Trinidad, and from the coast of Chubut, Argentina (42° S.), 

 to the Falkland Islands; in the eastern Pacific: from the Bering Sea to 



