CETACEA, oF 
** Teeth of upper and lower jaw conical, deciduous. 
5. BELUGA. 
Head rounded ; forehead convex ; teeth conical only on the 
- front half of the jaws, oblique, often truncated, and the upper 
_ often deciduous ; dorsal fin none ; pectoral suboval; tongue ob- 
long, with a simple, slightly raised edge; skull with the nose and 
the hinder wing of the maxilla bent down on the orbits, making 
_ the forehead very convex; lower jaw not so wide as the upper, 
with the condyle low down below the middle of the hinder edge. 
ae) 
‘ -—Zool. Ereb. & Terror, t. 29. fig. 3. 
 Delphinopterus, Lacep. Cet. 243. 
_ Delphinapterus F. Cuv. D. S. N. lix. 517, 1829: 
_ Beluga, Rafin. Anal. Nat. 60,1815; Gray, Spic. Zool. 2, 1828 ; 
Lesson, Man.; Bell, Brit. Quad: 1837. 
Delphis, Wagler, N. S. Amph. 34, 1830. 
_ Delphinus, pars, Linn. ; Illiger, Prod. 143, 1811. 
; Catodon, pars, Artedi, Gen. 78; Fleming, B. A. 29. 
Cetus, pars, Brisson, R.A. i. 227, 1762. 
Physeter, pars, Linn. S. N. ° 
Cachalot, pars, Lacep. Cet. 
Phocena, pars, F. Cuv. Cetac. 
H There is a great similarity in the general form of the skulls of 
-Phocena, Beluga and Monoceros, but independent of the size 
and teeth, they differ im the form of the convexity in front of the 
blower ; in Beluga the frout of the blower is flattish, m Mono- 
_ceros there is a broad, half-oblong convexity, and in Phocena a 
squarish tuberosity. 
_ The genus Delphinopterus was formed by Lacepéde to contain 
- this animal, which he before described as a Catodon, and the 
_D. Senedette, which is probably a Catodon. It has been applied 
by Peron, Cuvier and others to a very different animal. 
iw * 
i. Betuca Catopon. The NorTHERN BELUGA. 
i, White ; young black ; the nose of the skull nearly $ the entire 
length, 12 the length of its width at the anterior notch; teeth 
$3. 
Jalaena minor in inferiore maxilla tantum dentata, sine pmna aut 
spina in dorso.—Sibbald, Phal. 9; Raw Syn. Pise. 15. 
Cetus bipinnis, Brisson, R. A. 361. 
Catodon fistula in rostro, Artedi, Gen. 78; Syn. 108. 
‘Physeter Catodon, Linn. S. N. 107; Gmelin, S. N.i. 226; Desm. 
_ Mam. 525, from Balena minor, Sibbald, Phal. 9. 
2? Cetus minor, Brisson, Reg. Anim. 361. 
