-2. LAGENOCETUS. 339 



Lagenocetus latifrous. 



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 hiader part of the skull ; 

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

 rather compressed. 



Hyperoodon latifrons, Gray, Zool. Erehm Se Terror, 27. t. 4 (skull) : 



P. Z. S. 1860, 424, 425; 1861, 313. 

 Hyperoodon (adult), Gervais, Zool. et PaUont. Frcmg. t. 38. f. 6, cop. 



Gray, Zool. Ereb. 8f Terr. 

 Hyperoodon Butzkopf (male), Erichson, Ann. ^ Mag. N. M. 1852. 

 Lag-enocetus latifrons. Gray, P. Z. 8. 1864, 241. 



luhab. 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 skull 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 skuH, from the Firth of Forth, 29th October, 

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

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

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

 accompanied by a young male. — See Thompson, Ann. ^ 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 Butzkopf), because 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 evident mistake, from mistaking an accidental coincidence 

 for an established ia.ct:'— 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 

 skuUs is so different, that it is much more Hkely 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 Edinburgh, which was obtained 

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

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

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



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