416 PROF. W. H. FLOWER ON THE GENUS MESOPLODON. 
Mesoplodon sowerbiensis, Van Beneden, Mém. Acad. Belgique, coll. in 8yo, t. xvi. (1863). 
M. sowerbensis, Gervais and Van Beneden, Ostéographie des Cétacés, p. 392 (1877). 
Micropteron bidens, Malm, “ Hyaldjur i Sveriges Museer ar 1869,” K. Svenska Vetenskaps-Akad. 
Handl. 1871. 
Hab. Coast of Elginshire (Sowerby) ; Havre (Blainville); Ostend (Dumortier); Sale- 
nelles, Calvados (H. Deslongchamps); Brandon Bay, Ireland (Andrews); Norway 
(Malm). 
2. M. EUROP&US (Gervais). 
Dioplodon europeus, Gervais, Zool. et Pal. frangaises, 1" édit. t. 11. Explic. No. 40 (1850). 
D. gervaisii, B. Deslongchamps, Bull. de la Société Linnéenne de Normandie, tome x. (1866). 
A single specimen found floating in the sea at the entrance of the British Channel 
about 1840. ‘The skull is now in the Museum at Caen. It should be mentioned that 
some doubts have been thrown upon the supposed distinctive characters between this 
and the last species. 
3. M. DENsrRostRIS (Blainville). 
Delphinus densirostris, Blainyille, Nouv. Dict. d’Histoire Nat. 2nd edit. tome ix. p. 178(1817). 
Mesodiodon densirostris, Duvernoy, Annales des Sciences Naturelles, sér. 3, t. xv. p. 59 (1851). 
Ziphius sechellensis, Gray, Zool. E. & T. p. 28 (1846) ; Krefft, P. Z.S. 1870, p. 426. 
Dioplodon densirostris, Gervais, Zool. et Pal. frangaises, 1° édit. t. 11. Explic. No. 40 (1850) ; Ann. 
des Sciences Nat. sér. 3, t. xiv. p. 16 (1850). 
Hab. Seychelles Islands (Duvernoy); South Africa (Mus. R. Coll. Surgeons); Lord 
Howe’s Island (Krefft). 
4, M. LAYArDI (Gray). 
Ziphius layardi, Gray, P. Z. S. 1865, p. 358; Owen, Crag Cetacea, p. 12, pl. i. (1870). 
Ziphius (Dolichodon) layardi, Gray, Cat. Seals and Whales Brit. Mus. p. 353 (1866). 
Dolichodon layardii, Hector, Trans. New-Zealand Inst. vol. v. p. 166, pl. iii. (1872). 
Mesoplodon longirostris, Kreftt, MS., M. giintheri, Krefft, MS., and Callidon giintheri, Gray, 
Ann. Mag. Nat. Hist. ser. 4, vil. p. 368 (1871). 
Dolichodon traversii, Gray, Trans. New-Zealand Inst. vol. vi. p. 96 (1874). 
Mesoplodon floweri, Haast, P. Z.S. 1876, p. 478. 
Hab. Cape of Good Hope (Layard); Near Sydney (Krefft) ; New Zealand (Haast) ; 
Chatham Islands (Hector). 
Two skulls, an adult and a young specimen, of this well-established species were 
brought home by the naturalists of the ‘ Challenger,’ and will be described in detail by 
Professor Turner in his Report on the Marine Mammalia collected during the expedition. 
5. M. wEcrori (Gray). 
Berardius arnuaii, Hector, Trans. New-Zeal. Inst. vol. ii. p. 27 (1870). 
Smaller Ziphioid Whale, Knox & Hector, T. New-Zeal. Inst. vol. iii. p. 125, pls. xiii., xiv. & xv. (1871). 
