CETACEA. Ill 



the lower jaw obliquely truncated, with a rather prominent gonyx. 

 The elongated intermaxilla and the vomer are visible in the palate. 

 In the old skulls the intermaxillaries are width above, and the 

 sides of the maxillaries are shelving. In skull n. 1126 (Mus. 

 Coll. Surg.) the teeth are very oblique and truncated at the end. 



In all the skulls I have seen of this species the teeth are more 

 or less worn down, but Mr. Bell says he has two skulls in which 

 they are acute. Brit. Quad. 472. M. F. Cuvier (Cetac. 223) 

 complains of Montague's figure of the skull of D. truncatus : he 

 does not recognize in it the D. Tursio, but thinks it most re- 

 sembles D. Delphis ! Hence the origin of his complaint. 



A stuffed specimen and skeleton, in the Edinburgh University 

 Museum, from the Firth of Forth, have all the teeth truncated 

 and flat. A skeleton in the Surgeons' Hall of Edinburgh, from 

 the same locality, has them all acute. The latter is named 

 D. Delphis. The atlas (or first) and second cervical vertebras 

 united by the body and lateral process ; the third to the seventh 

 cervical vertebrae free. 



A specimen with teeth f f , large, conical, acute, was taken in 

 the river Orwell, May 10, 1849. 



5. DELPHINUS ABUSALAM. The ABUSALAM. 



Black, below white, with small dark spots; teeth %%-%%. 

 Nose of skull about f of length, 2| its width at the notch. In- 

 termaxillary bones very convex, forming a strong ridge on each 

 side. Lower jaw tapering in front. 



Delphinus abusalam, Rupp. Mus. Senk. 1842, t. 12. f. 1, 2, 3 ; 



Gray, Zool. Erebus Terror, 38. 

 Inhab. Red Sea. 



Only known from Dr. RiippelFs description and figure. It 

 has been said to be the same as D. Tursio, but it appears to be 

 different. 



Delphinus aduncus, Hemp. fy Ehrenb. Sym. Phys. ii. Beak de- 

 pressed, elongate; teeth f-f, conical, strong, Inhab. Island of 

 Belhosse, is perhaps the same as the former. 



6. DELPHINUS EUTROPIA. The EUTROPIA. 



Nose of skull rather longer than the length of the brain-cavity, 

 rather dilated on the sides before the notch, very convex and 

 rounded above. Triangle elongate, produced before the teeth- 

 line, concave on the sides and strongly keeled in the centre 

 behind ; hinder edge of blow-hole rather prominent. Intermaxil- 

 laries wide, convex above, leaving a rather broad open space in 

 front. Lower jaw thick, blunt, and rather produced beyond the 



