CETACEA. 135 
__ Blackish, pale beneath, with a white streak along each side 
from behind the blower, ‘where it is broadest and gradually be- 
coming narrower behind, not quite reaching to the tail. 
_ According to Desmarest, Freminville saw a dolphin on the 
_ coast of Brazil, which was 15 feet long, with a very convex fore- 
_ head; ashy, with a white streak on each side of the head, on the 
- back, throat and belly. 
- 
B. Jaws much compressed. Symphysis of the lower jaw very 
long. Dorsal none. Teeth in both jaws rugose. Flu- 
viatile. 
d. Skull with the maxillary bones simple, expanded over the 
orbit. Teeth conical, with a tubercle on inner side. 
Pectoral fins or paddles ovate or oblong. Iniana. 
| Iniana, Gray, Zool. Erebus & Terror, 45. 
16. Intra. 
__ Head rounded, convex. Nose produced, nearly cylindrical, 
tapering, hairy. Blowers oblique, nearly above the pectoral fins. 
_ Ear-hole distinct. Teeth numerous, rugose, grooved, perma- 
nent; the front hooked; the hinder, close at the base, with a 
large rounded tubercle on the inner side. Dorsal fin none, but 
_the back is keeled, ovate and subtriangular behind. Body com- 
pressed behind. Pectoral fin large. The skull depressed, with 
the nose twice as long as the brain-cavity, compressed, with a 
_ groove along each side. Temporal cavity very large, edged above’ 
3 by a strong crest, and the orbital hole very short, Foie. 
- Muzzle of the young hairy. 
“Inia, D’Orbigny, Ann. Sci. Nat.; Nov. Ann. Mus. vii. t. 22. 
_ Delphinus, sp. Desm. 
 Delphinorhynchus, sp. F. Cuvier. 
1. Inta Georrroyit. The Intra. 
- Delphinus Geoffroyu, Desm. Mam. 512. 
_ D. Geoffroyensis, Blainv. Desm. N. Dict. H. N. ix. 151. 
J). a bee mince,” Cuvier, R. A. 1. 2782 
_ Delphimorhynchus frontatus, F. Cuv. Cetac. 121. 
Delphinorhynchus Geoffroyii, Lesson, Man. 405. 
_ Inia Boliviensis, D’Orbigny, N. Ann. Mus. vi. t. 22. f. 3, cop. 
F. Cuv. Cetac. 166. t. 10*. t. 11; D’Orb. Voy. Amer. Mérid. 
t. 22, animal and skull. 
Pale blue, reddish beneath ; fins and tail olive, some reddish, 
_ others blacker; teeth 23-34. 
___Inhab. Upper Peru or Bolivia, River Moxos. Animal and skull 
- Mus. Paris. 
