106 CETACEA. 
SECTION OF GENERA. 
a. Head shortly beaked. Nose of skull moderate. Tri 
on hinder part of beak elongate, produced before the teeth- — 
line. Palate flat. Teeth 24-48. 
+ Beak scarcely produced. Nose of skull rather depresse 1, 
scarcely longer than the brain-cavity. Teeth 24-39. 
Species No. 1-3. 7” 
++ Beak short. Nose of skull thick, conical, convex abe . 
half as long as the head. 4 
_* Beak aa skull rather thick, and rather swollen on the s 
No. 4 
** Beak of skull rather thick, conical, evenly tapering. No.8 ¢ 
*** Beak of skull slender, subcylindrical. No. 10-11. 
b. Head longly beaked. Nose of skull slender, light, rather 
depressed, especially in front, much longer than the heaa d. 
Teeth 42-88. . 
* Skull flattened behind. Triangle to the teeth-line. Palate 
flat, not grooved on the side. No. 12-15. . be 
** Skull roundish. Triangle just to the teeth-line. Pala e 
with a deep groove on each side and a high central ridge 
behind. . 
+ Beak moderate, 14 the length of the brain-cavity. Teeth % a 
or 88. No. 16-20. ; 
+t Beak of skull twice as long as the brain-cavity. Teeth $3—8 af 
No. 21. bi 4 
*** Skull round. ‘Triangle not reaching to the teeth-line. 
Palate convex, with a very concave line on the hinder part 
of each side. Beak twice as long as the head. Teeth $8. 
No. 22. ul 
a. Head shortly beaked. Nose of skull moderate. Triangle 
on hinder part of beak elongate, produced before the tee th- 
line. Palate flat. Teeth 24-48. “ 
+ Beak scarcely produced. Nose of skull rather depress i 
scarcely longer than the brain-cavity. Teeth 24-38. Ce- 
phalorhynehus. 
Cephalorhynchus, F. Cuvier, Cetac. 
Grampus, pars, Gray, Spic. Zool. 2, 1828. 
