116 CETACEA. 



with an elongated groove between them in front, f the entire 

 length, twice and a half the length of the width at the notch ; 

 the triangular impression in front of the hlower rather elongate, 

 produced a little beyond the line of the hinder tooth, rugose in 

 front, with oblique grooves on each side ; teeth ^g, small, slightly 

 incurved, acute, six in an inch. 



Delphinus Clymene, Gray, Cat. Osteol. Spec. B. M. 35. 



D. Metis (no. 2), Gray, Zool. Erebus and Terror, 39 (not no. 1 nor 



figure). 

 Inhab. ? 



in. lin. 



Skull : Length, entire 15 7 



of head 6 3 



of nose 9 4 



of tooth-line 7 4 



Width of temple 610 



at nostril 3 7 



at middle of back 22 



of intermaxillaries .... 1 



This species is like the D. Doris in size, but the skull behind the 

 frontal ridge is much flatter, and gradually shelving to the fora- 

 men magnum., and the beak is more depressed. 



Var. In the museum of the Bristol Institution there is an 

 imperfect skull, apparently of this species, which differs in the 

 nose being about f of an inch shorter, and rather narrower. It 

 has 36 teeth in the upper jaw. 



Skull : Length of nose 8* 7 ' 



Width at notch 3 8 



at middle of nose .... 2 



A lower jaw is fitted to it, which has no teeth and a short gonyx, 

 but it is doubtful if it belong to the same animal ; its length is 

 12J, symphysis l inch. 



A second skull in the same collection is very similar, and 

 has If teeth. 



in. lin. 



Skull : Length, entire 15 



of nose 9 



Width at notch 3 4 



at middle of nose .... 110 



This skull only differs from the former in the lower jaw being 

 slenderer and united by a longer symphysis in front. Lower jaw 

 124 inches long; symphysis 2 inches. 

 These are probably indications of two other species. The hinder 



