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 fy Terror, 45. 



16. INIA. 



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 

 by a strong crest, and the orbital hole very short, roundish. 

 Muzzle of the young hairy. 



Inia, D'Orbigny, Ann. Sci. Nat.; Nov. Ann. Mus. vii. t. 22. 

 Delphinus, sp. Desm. 

 Delphinorhynchus, sp. F. Cuvier. 



}. INIA GEOFFROYII. The INIA. 



Delphinus Geoffroyii, Desm. Mam. 512. 



D. Geoftroyensis, Blainv. Desm. N. Diet. H. N. ix. 151. 



"D. a bee mince," Cuvier, R. A. i. 278? 



Delphinorhynchus frontatus, F. Cuv. Cetac. 121. 



Delphinorhynchus Geonroyii, Lesson, Man. 405. 



Inia Boliviensis, D'Orbigny, N. Ann. Mus. vii. t. 22. f. 3, cop. 



F. Cuv. Cetac. 166. t. 10*. t. 11; D'Orb. Voy. Amer. Merid. 



t. 22, animal and skull. 



Pale blue, reddish beneath ; fins and tail olive, some reddish, 

 others blacker ; teeth ff-ff. 



Inhab. Upper Peru or Bolivia, River Moxos. Animal and skull 

 Mus. Paris, 



