70 CETACEA. 



There is a skull from Greenland, presented by Capt. Wareham, 

 in the Newcastle Museum. Height of occiput, 25 ; of ridge, 32. 

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



There is also a skeleton with the skull from the Firth of Forth, in 

 the College Museum, Edinburgh; the skull of which is 68 inches 

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

 rounded externally. 



There is a very perfect skull of this species in a garden on the 

 borders of Lancaster Bay, taken in that bay. 



The examination of four skeletons and six or eight skulls of 

 H. rostratum, and of three skulls of this species, have satisfied me 

 that it must be the remains of a perfectly distinct species : it not 

 only differs from H. rostratum in the thickness and solidity of the 

 crest, but in the crest being much higher than the hinder part of 

 the skull, while in all the skulls of H . Butzkopf the crest is of 

 the same height with the frontal ridge. 



Doubtful species. 



1. Delphinus densirostris, Desm. Nouv. Diet. N. ix. 178; Mam. 



522, note. 



Only described from a fragment of a jaw, 9 inches long, 2 

 inches high, and 2 inches broad at the widest part, straight, py- 

 ramidical, triangular at the end, and without any teeth or cavity 

 for any tooth in the lower jaw. It is very heavy and dense. 

 Probably the end of a Hyperoodon. 



2. Alugninich, Tschieduk, Chamisso, Nov. Act. Nat. Cur. xii. 261. 



t. 20. f. 8, which Fischer (Syn. Mam. 515) refers with doubt 

 to D. spurius, is perhaps a species of this genus. 



One of the species of this genus may probably be the Goose- 

 beaked Whale of Pontoppidan, Hist. Nat. Norway, ch. v. 123, 

 124. f. 



2. ZIPHIUS. 



Head contracted behind ; nose produced, not separated from 

 the forehead; eyes moderate; blowers on crown, lunate; teeth 

 two, large, compressed, in the middle of the lower jaw ; throat 

 with two diverging furrows ; body elongate ; pectoral fins small, 

 low down, oval, tapering; dorsal falcate, behind the middle of 

 the body. 



Skull with nose elongated, produced, keeled on each side ; 

 skull-cavity small; forehead high; hinder wing of the maxilla 

 expanded, horizontal ; palate smooth ; lower jaw r broad behind, 

 narrowed and bent down in front of the large lateral teeth. 



