42 



the teeth line ; teeth 44 ttj small, cylindrical, hooked ; 

 palate flat in front, with a broad groove extending nearly 

 half its length beliind ; intermaxillaries and palatine dis- 

 tinct, former broad in front ; lower jaw slender, shelving, 

 and flat-sided in front. 

 Inhab. Madagascar, Dussumier, 1838. Mus. Paris. 



Forster's Dolphin. Delphinus Forsteri. 

 Tab. 24, from Forster, Icon. 

 Delphinus Delphis, Forster, Descrip. Anim. 280. Icon, 

 ined. Brit. Mm. t. 31. 



Greenish brown or rust-coloured, beneath white; a small 

 white spot on the disk of the dorsal and pectoral fin ; teeth 

 -ii= 176, acute, erect, conical, incurved. Skull, ? 



Inhab. Pacific Ocean, between New Caledonia and Nor- 

 folk Island, Forster, 1774. 



"Body straight, round, thickest behind; the pectoral fin 

 tapering at both ends ; head rounded, shelving in front, 

 beaked; beak straight, pointed, cylindrical, depressed, at- 

 tenuated and blunt at the tip; upper jaw shorter, both 

 blunt, toothed ; eyes small, lateral, oblong, nearly in the 

 middle of the side, near the gape of the mouth, a small 

 hole (the ears) above and behind the eyes; blower single, 

 between the eyes in crown, lunate ; a linear abdominal slit 

 a little behind and beneath the dorsal fin, the front part 

 the vulva, the hinder the vent ; teats 2, one on each side 

 the vulva, with a nipple the size of a pea; tail compressed 

 on the sides, keeled above and below, and attenuated to- 

 wards the tip ; pectoral fin lanceolate, scarcely so long as 

 the beak ; dorsal fin in the middle of the back, nearly 3- 

 sided, falcate behind, as long as the beak ; tail horizontal, 

 2-lobed, each lobe oblong, lateral, subfalcate. 



" Gregarious, swimming very rapidly around the ships 

 and boats. 



" Length 6 feet from nose to tail." — Forster. 



This species resembles, in the distribution of its colour- 

 ing, X)««/j/(/« a band fail ve (Voy. Pole Sud), but the band 

 on the side is whitish, not fulvous. 



The Blue-and- WHITE Dolphin. Delphinus casrnleo-albus. 



Delphinus CEeruleo-albus, Met/en, Act. Nat. Cur. xvi. 

 609, /. 43,/. 2. 



Teeth ^; white, back bluish, with oblique streaks on 

 the sides, belly white. Skull t 



Inhab. East Coast of South America, Rio de la Plata. 



Length 5 feet 6 in. Skeleton in Mus. Anat. Mus. Berlin. 



tt Beak of skull twice as long as the brain-cavity. 



The Cape Dolphin. Delphinus longirostris. 



Delphinus longirostris, Gray, Spic. Zool. t. Cuv. R. 

 A. i. 288, from Dussumier, MSS. Schleyel, Ahh. t.1,2 &. 4, 

 ./'. 1. Faun. Japon. t. 24. 



D. Capensis, Gray, Spic. Zool. t. 2,/. 1, not Cuv. nor 

 Rapp. 



Black ; dorsal fin large, high ; teeth, ||-^§ ; nose ^ of 

 entire length ; skull nearly 3\ times the length of its 

 breadth at the notch. 



Inhab. Southern Ocean. Cape of Good Hope, Gray. 

 JajDan and Ceylon, Schleyel. Malabar, Dussumier. 



Length, entire, 81 inches. 



„ of beak, 7 



„ to angle of mouth, 13 



„ to blowers, 7\ 



„ to dorsal fin, .... 38 



5, to pectoral fin, .... 21 



„ of dorsal, 12 



„ of pectoral, 13 



Breadth of pectoral, 5 



„ of tail, 26 



Circumference, 42 



The figure in the ' Fauna Japonica ' is from a drawing 

 by a Japanese artist, made under Mr. Burger's direction. 



Skull in the Paris Museum (n. 4), from Malabar, brought 

 by M. Dussumier, 1827. 



Skull, length .... 2-0 



„ of beak .... 13-9 



Width at notch .... 3-2 

 „ of middle of beak 1-7 



Palate with a deep groove on each side of a central ridge 

 in the hinder half, slightly keeled behind near blower; beak 

 very long, very tapering ; nasal very convex, rounded ; 

 teeth \^, small, slightly curved ; triangle exactly to the 

 teeth line. 



*** Skull rotmd ; triangle not reaching to the teeth-line ; 

 palate conve.v, with a very concave line on the hinder 

 part of each side ; beak twice as long as headi 



The Small-headed Dolphin. Delphinus microps. 



Tab. 25. Skull. 



Skull small, subglobular ; palate convex ; nose very 

 long, slender, twice as long as the length of the brain-ca- 

 vity, nearly four times as long as broad at the notch ; in- 

 termaxillary convex above, with a broad cavity between 

 them in front, rather contracted in front of the blowers ; 

 teeth ^l ; maxillaries very spongy ; the triangle in front 

 of the blowers short, not nearly reaching to the line of the 

 hinder tooth. 



Inhab. .' 



Dimensions of skulls in inches and lines. 



Mus. Norw. Mus. Brit. M.C.S. 



Length, entire, 17'6 in. 156 in. 150 in. 



„ of nose, .... 9'6 



„ of teeth-line, .... 8 



„ oflowerjaw, .... 14'9 13-0 12-6 



Width at notch, 2-7 2-6 



„ at orbits, ... 5'3 



„ ofmiddleofbeak, .... 2-3 2'7 2-6 



„ of intermaxillaries 8 9 



Var. 1. Head smaller, and the nose rather shorter, only 



If the length of the brain-cavity, but quite as long as 

 compared with the width of the notch. 



This skull resembles Schlegel's figure of the skull of D. 



