2. LAfjEXocETrs. 339 



Lagenocetus latifrons. 



Skull large, 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, solid, conical, acute, 

 rather compressed. 



Il3-peroodon latifrons, Graj/, Zool. Erebus Sf Terror, 27. t. 4 (skidl) ; 



r. Z. S. 1800, 424, 425 ; 1861, 313. 

 H}^eroodou (adult), Gervais, Zool. et Palcont. Franq. t. 38. f. 0, cop. 



Gray, Zool. Ereh. Sj- Terr. 

 Ilyperoodon Butzliopf (male), Erichson, A7in. t*j- 3Iag, N, H. 1852. 

 Lagenocetus latifrons. Gray, P. Z. S. 1804, 241. 



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



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

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



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

 Height of skuU behind 42 „ 



A skull from Greenland, presented by Captain Wareham, is in the 

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

 skull 92, to front of ridge 54, of beak 26 inches. 



A skeleton with the skull, from the Firth of Forth, 29th October, 

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

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

 rounded externally. This is the skull of a female, 28g feet long, 

 accompanied by a young male. — See Thom_pson, Ann. Sf Mag, N. H. 

 1846, xvii. 153. 



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

 of Lancaster Bay, taken in Morecomb Bay. 



" Professor Eschricht considers that Lagenocetus is founded on the 

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

 roodon Bufzl-oj)/), because the specimen of the animal with this kind 

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

 Zool. Soc. I860, 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 csddent mistake, from mistaking an accidental coincidence 

 for an established fact." — Gray, Proc. Zool. Soc. 1861, 313. 



" The following facts I think will dispel such an idea : — first, I 

 think I can prove that males and females have been seen and preserved 

 of both species ; and secondly, the structure and form of the two 

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

 referable to two very distinct 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 skull of an adult animal of this 

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

 from the Frith of Forth on the 29th of October, 1839. Mr. William 

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

 us that this specimen was a female 28;^ feet long, accompanied by a 



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