CETACEA. 127 
— Var.1. Skull in Mus. Coll. Surg. Edin. n. 164. Barclay Col- 
lection. Head smaller, and the nose rather shorter, only 1# the 
length of the brain-cavity, but quite as long as compared with 
the width of the notch. Length, entire, 16°6, of beak 10°6; 
_ width at notch 3:0; triangle to the teeth-lme rugose. Nose 
_ groove open in front. Teeth z;, small, curved. 
_ This skull resembles Schlegel’s figure of the skull of D. ongi- 
_ rostris in general form, but the beak is rather more slender, and 
_ the orbits more obliquely truncated in front. 
14. STENO. 
_ Head convex. Forehead convex. Beak moderate, tapering. 
_ Body elongate, fusiform. Pectoral fin moderate, ovate, falcate. 
- Dorsal faleate, in the middle of the back. Skull round, sub- 
_ globular. Forehead erect. Beak elongate, compressed, higher 
_ than broad, tapering in front, convex above. Triangle elongate, 
deep, produced rather beyond the teeth-line. Palate convex, not 
_ grooved on the side. Lower jaw elongate, compressed in front ; 
_ symphysis elongate, about 4 the length. 
Steno, Gray, Zool. Erebus & Terror, 43, 1847. 
Delphinus, sp. Cuvier ; Schlegel. 
This genus is at once known from Lagenorhynchus and Dei- 
_ phinus by the length, compression, and tapering form of the beak 
of the skull. 
The foetus of Steno fuscus is very peculiar for the elongated 
_ tapering head ; the pectoral fins are rather large, strongly falcate ; 
_ the dorsal rather beyond the middle of the back. Its tongue is 
_ flat on the top, and nearly as broad as the space between the sides 
of the jaws; it is entire on the edges of the sides, and slightly 
dilated in front, crenulated on the edge, and with a larger flat 
lobe in the middle of the tip. See Zool. Erebus & Terror, t. 26. 
mr. 1, a, 0, c. 
* Beak separated from the forehead by a cross groove. 
1. Steno MALAyANus. The Matay DoLpHIn. 
Grey-ash above and below; nose of skull about 3 of the entire 
length; teeth 33. 
Delphinus Malayanus, Lesson, Voy. Coq. t. 9 
© 152; Schlegel, Abh. i.t.1, 2. f. 2. t. 4. f. 3. 
. D. Capensis, Rapp. Cetac. t. 2. f.1, not Gray 
_ D. Rappu, Reichd. Cetac. in. 48. t. 18. f. 5, 
~ 
