2. L.VGENOCETrS. 330 



Lagenocetus latifrons. 



Skull larg'o, heavy, solid ; the reflexed part of the maxillary bones 

 very much thickened internally so as nearly to touch each other in 

 front of the blower, much higher than the hinder part of the skull ; 

 lower jaw rather curved up at the tip ; teeth 2, soHd, conical, acute, 

 rather compressed. 



Ilvperoodon latifrons, Grai/, Zool. Erehts Sf Terror, 27. t. 4 (skull); 



"!>. Z. S. 1800, 424, 425 ; 'l8Gl, 313. 

 Hyperoodou (adult), Gervais, Zool. et PaUont. Franx;. t. 38. f. G, cop. 



Ortnj, Zuol. Urih. Sf Terr. 

 Ilj-peroodon Rutzkopf (male), Erichson, Ann. Sr 3Iag. N. H. 1852. 

 Lagenocetus latifrons, Gray, P. Z. S. 1864, 241. 



Inhab. North Sea. Coast of Lancashire ; Orkneys ; Greenland, 

 a. Skull imperfect. Orkneys. From Mr. Warwick's collection. — 

 The skidl figured in ' Voyage of the Erebus and Terror,' t. 4. 



Length of skull (wanting the end) . . 62 inches. 

 Height of skull behind 42 „ 



A skull from Greenland, pi-esented by Captain Wareham, is in the 

 Newcastle Museum. Height of occiput 25, of ridge 32 ; length of 

 skuU 1)2, to front of ridge 54, of beak 26 inches. 



A skeleton with the skuU, from the Firth of Forth, 2i)th October, 

 1839, is in the College Museum, Edinburgh. The skull is 68 inches 

 long ; the crests very thick, far apart, and erect internally and 

 roimdcd externally. This is the skull of a female, 28| feet long, 

 accompanied by a young male. — See Thompson, Ann. 4" J/o^. N. II. 

 1846, xvii. 153. 



A very imperfect skuU of this species in a garden on the borders 

 of Lancaster Bay, taken in Morecomb Bay. 



" Professor Eschricht considers that Lagenocetiis is foimded on the 

 skull of an adult male of the common species (which he calls Hiipe- 

 roodon Biitzlr)2]f ),'hccaxisc the specimen of the animal with this kind 

 of skull which he received from Faroe was of that sex" (Gray, Proc. 

 Zool. Soc. 1860, 424) ; " and he exhibits them side by side, as the 

 same animal, in his museum (see Ann. & Mag. N. H. 1852, ix. 281). 

 This is an e\-ident mistake, from mistaking an accidental coincidence 

 for an established fact." — Grai/, Free. Zool. Soc. 1861, 313. 



'' The foUoAving facts I think will dispel such an idea : — first, I 

 think I can prove that males and females have been seen and presei-ved 

 of biTth species ; and secondl}-, the structure and form of the two 

 skulls is so different, that it is much more likely that they shoidd be 

 referable to two very cUstinct genera than to species of the same 

 genus. 



" I may state that I have examined four skulls of the Lagenocetus 

 latifrons, and Professor Eschricht has another. 



" There is a skeleton with the skuU of an adult animal of this 

 species in the College Museimi at Edinbm-gh, which was obtained 

 from the Frith of Forth on the 2'Jth of October, 1839. Mr. William 

 Thompson (Ann. & Mag. Nat. Hist. 1846, vol. xvii. p. 153) informs 

 us that this specimen was a female 284 feet long, accompanied bv a 



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