38 



In the skull of Montague's specimen, in the British Mu- 

 seum, the 4tli and 10th teeth from the front on each side 

 appear by the hole to have been larger than the rest. We 

 have a second imperfect skull of the same measurement. 

 M. F. Cuvier {Cetac. 2-23), as usual, complains of Monta- 

 gue's figure of the skull of this species : he does not recog- 

 nize in it the D. Tiirsio, and thinks it most resembles D. 

 Delphis ! 



The skull on the skeleton presented by Mr. Houship, in 

 Mus. Col. Surg. (n. 11-25), taken below the Nore, in June, 

 18-28, has the teeth 44, the two hinder upper without any 

 opposite, the 4, 5, 6 upper are largest, the middle lower 

 are truncated, 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. 11-26 (Mus. Col. 

 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. 47-2. 

 There is some difficulty about the colour of this species, 

 which may arise from two being confounded under one 

 name. Bonnaterre, Montague and Wright describe it 

 as black above and whitish beneath ; O. Fabricius as all 

 blackish, the belly a little whiter and the young paler ; 

 Schlegel figures it as all of a uniform deep black colour. 



The Abusalam. Delphinus Abusalam. 



Delphinus abusalum, Rupp. Mus. Senk. 1842, t. 12, f. 

 1 " 3 



1, ^, o. 



Black, below white, with small dark spots ; teeth f^-ys- 

 Nose of skull about |- of length, 23- its width at the notch. 

 Intermaxillary bones very convex, forming a strong ridge 

 on each side. Lower jaw tapering in front. 



Inhab. Red Sea. 



Only known from Dr. Riippell's description and figure. 

 It has been said to be the same as D. Tursio, but it ap- 

 pears very different. 



Delphinus aduncus. Hemp. <V Ehrenb. Si/n. Phys. ii. 



Beak depressed, elongate ; teeth -l-l-, conical, strong ; 

 Expanse 6', head 7" ; width of jaws at the end of the 

 teeth 2"-6j" ; at the middle of the jaws I" 9.'" 



Inhab. Island of Belhosse. 



Is perhaps the same as the former. 



The EuRYNOME. Delphinus Eurynome. 



Tab. 17. Skull. 



D. Eurynome, Gray, Cat. Ost. B. M. .3(5. 



Skull roundish ; nose thick, broad, rounded above ; in- 

 termaxillaries rather convex, j as wide as maxillaries ; 

 nose J longer than the length of the head (or 4^- of entire 

 length), twice and ^ the length of the width at the notch ; 

 back of blower largely tubercular ; teeth i\, moderate, cy- 

 lindrical, rather curved, acute. 



Inhab. 



.? Skull, Mus. Brit. 



Skull, Length entire .... 22'0 



„ of head .... 9-1 



„ of nose .... 123 



„ of teeth line lO'O 



„ of lower jaw .... 18'0 



Width at temples .... ll'O 



„ at notch .... 5-4 



„ at middle of beak 3'6 

 The skull of this species is most like D. Tur.sio, but the 

 nose is ^th, slenderer and more rounded and the teeth 

 smaller. 

 XX Beak 0/ skull rather thick, conical, evenly tapering. 

 The Metis. Delphinus Metis. 

 Tab. 



D. Metis, Gray, Cat. Ost. B. M. 36. 



Skull globular ; back of blower tubercular ; nose 

 thick, rather conical, regularly tapering, upper part con- 

 vex, rather longer than the head and rather more than 

 twice as long as the width at the notch ; intermaxillaries 

 convex, rather more than half the width at the beak; teeth 

 41, rather conical, acute, curved. 



Inhab. Brit. Mus. 



Skull, Length entire .... 21-0 



„ of nose .... irO 



„ of lower jaw 17-0 



Breadth of orbit .... 9-6 



„ notch .... S'O 



„ middle of beak 30 



This skull is like the former, but differs in the nose 

 being shorter compared with the length of the head, more 

 tapering, and the teelh rather longer. It differs from D. 

 Tursio in the nose being much shorter and more conical 

 and acute. 



The Cymodoce. Delphinus Cymodoce. 



Tab. 



D. Cymodoce, Gray, Cat. Ost. B. M. 35. 



Skull roundish ; nose broad, rounded above, broad at 

 the base, gradually tapering in front and rather convex on 

 the sides, -rV longer than the head, or rather more than 

 half the entire length and rather more than twice as long 

 as the width at the notch ; the triangular impression in 

 front of the blower rather elongate, extended rather beyond 

 the line of the hinder teeth ; teeth W, moderate, conical, 

 slightly incurved, acute (rather more than 3 in one inch) ; 

 lower jaw regularly converging, straight on the sides, the 

 front obliquely truncated, and the gonyx slightly produced. 



Inhab. ^ _ . - - 



