' 
[19] COLLECTING SPECIMENS OF CETACEANS. 
fé. Teeth about 44 in each jaw. 
; Tursiops. Bottle-nosed dolphins. (6.) (All 
seas. ) 
g®. Teeth from 80 to 120 in each jaw. 
Prodelphinus and Delphinus. Common dol- 
phins. (8and7.) (Coasts of all continents.) 
d+. No fin on the back, or simply a low ridge. 
g®. Pectorals pointed at the end. 
h®, Teeth 50 to 70 in each jaw. A ridge on the back. Beak long. 
Inia. The Inia. (2.) (Upper Amazon River 
and tributaries, South America. ) 
i, Teeth about 80 in each jaw. Beak short. 
Leucorhamphus. Right-whale porpoises. (9.) 
(Atlantic and Pacific Oceans.) : 
h®. Pectorals broad and truncated. Eyes very small(tinch). Beak turned 
up at the end, 
Platanista. TheSusu. (1.) (Rivers of India.) 
A SYSTEMATIC ARRANGEMENT OF THE GENERA AND 
HIGHER DIVISIONS OF CETACEANS. 
Order CETE.—Whales or Cetaceans. 
Sub-order DENTICETE.—Toothed Whales. 
Family PLATANISTIDZ.—The River Dolphins. 
1. Platanista, Wagler.—The Susu. 
The Ganges and Indus Rivers, India. 
2. Inia, D’Orbigny.—The Inia. 
The Amazon River and its tributaries. 
3. Pontoporia, Gray.—The Pontoporia. 
Coast of the Argentine Republic. 
Family DELPHINID @.—Porpoises and Dolphins. 
4, Sotalia, Gray.—River dolphins. 
Rivers of South America and India. 
5. Steno, Gray.—Long-beaked dolphins. 
Temperate and tropical seas. 
6. Tursiops, Gervais.—Bottle-nosed dolphins. 
All seas. 
7. Delphinus, Linné.—Common dolphins. 
Coasts of all continents. 
8. Prodelphinus, Gervais._-Common dolphins. 
All seas. 
9. Leucorhamphus, Lilljeborg.—Right-whale porpoises. 
Atlantic and Pacific Oceans. 
10. Lagenorhynchus, Gray.—Striped dolphins. 
All seas. 
