Ty COLLECTING SPECIMENS OF CETACEANS. 
| cae 7. Throat smooth. 
73 
Py seize AOLMY 
ZA 
8. Throat with folds. 
io) 
ie 9. Back with a hump. 
10. Back with a fin. 
11. Back smooth. 
12. Head rounded. 
13. Head with a beak. 
jie — 
14. Head pointed. 
