71 



Steno Aa?TENrATirs, Gray. The slender-beaked Dolpktn. 

 Teeth ^, small, about five in an inch. (See B.M.O. p. 235, and 

 Suppl. 1871, p. 66.) 



Steno BEETiMAinjsS Pucheran. The Singapore Dolphin. 

 Synonyms — Delphinus hrevimanus, Pucheran. Voy. Dumont d'Urville. 

 Steno Irevimanus, Gray. B.M.C., 1866, p. 236. 

 Teeth |f||, small, about five in an inch. 

 Inhab. Banda, Singapore. 



Steno EOSErvENTEis^ Pucheran. The Molucca Dolphin. 



Synonyms — Delphinus roseiventris, Pucheran. Voy. Dumont d'Urville. 

 Steno roseiventris, Gray. B.M.C., 1866, p. 233. 



Teeth g^, small, about five in an inch. 



" Greyish-black above, under half rosy- white ; orbit, streak from eye 

 to the pectoral, and pectoral fin, dusky. Beak elongate, slender. Beak 

 of skull very long, half as long again as the brain cavity." Gray. 



Inhab. Molucca. 



Steno PLxrvxiTrLis', Gervais. The Dolphin of the Upper Amazons. 



Synonyms — Delphinus fluviatilis, Gervais and DeKUe. 



Steno tucuxi, Gray. Suppl. B.M.C., 1871, p. 66. 

 Ste/no ? fluviatilis, Steno ? pallidus, Gray. Suppl. B.M.O., 

 1871, p. 66. 



Teeth 1^ to H^, smaU, about five in an inch. 



" S. fluviatilis, above blackish, a broad band from the eye to the 

 pectoral, and the pectoral fin black. Lower jaw and beneath rosy- 

 white, the white bent up so as to form a broad white lobe behind the 

 orbit over the pectoral." " S. tucuxi, dark blackish or fuscous ; it does 

 not roll over like the Bouko (Inia Geofiroyensis) , but comes to the 

 surface to breathe : called by the natives Tucuxi." " S. pallidus, pale 

 yellowish white above, beneath white." Both S. fluviatilis and S. pallidus 

 " may be the same as S. tucuxi." 



Inhab. " the upper parts of the Amazons Eiver, 1,500 miles from the 

 sea." See Gray. B.M.C. 1866, p. 236, 237. Suppl. 1871, p. 66. 



Steno Gtjianensis, Van Beneden. The Guiana Dolphin. 



Synonyms — Delphinus Guianensis, Van Beneden. 



Twsio ? Guianensis, Gray. B.M.C. 1866, p. 257. 



Sotalia Cruianensis, Gray. Suppl. 1871, p. 67. 

 Teeth S-g to ■^^, slender, conical, about five in an inch. 

 Inhab. British Guiana. 



^ Brevis, short, and manus, the hand. 



^ IRoseus, colour of a rose, rosy, and venter, the belly. 



^ Muviatilis, of or pertaining to a river, 



