_P. plagiodon_: Atlantic coast of North America from Cape Hatteras, Gulf of Mexico; 7 feet. _P. froenatus_: The Bridled Dolphin. Atlantic and Indian Oceans; about 6 feet. _P. malayanus_: East Indies; more than 6 feet. _P. coeruleoalbus_: South America, near mouth of River Plate; about 4 feet. _P. euphrosyne_: Atlantic Ocean to South Africa; about 8 feet. Genus _Tursiops_ _T. truncatus_: The Bottle-Nosed Dolphin. Has a short well-defined snout 2 or 3 inches long. There is a prominent fin in the middle of the back. Reaches a length of 11 to 12 feet. Has a very wide range. Commonest along the Atlantic coast of America from Maine to Florida. Found in Bay of Biscay, in the Mediterranean Sea, and in New Zealand waters. _T. abusalam_: Red Sea; 6 feet. _T. catalania_: Indian and Australian seas. Genus _Steno_ _S. rostratus_: The Rough-Toothed Dolphin. Long-beaked, with roughened or furrowed teeth. Atlantic and Indian Oceans; about 8 feet. Genus _Orcaella_ _O. brevirostris_: Irrawaddy River Dolphin. From Bay of Bengal, Vizagapatam, Singapore, and Siam (i.e., S.E. Asia). Genus _Lissodelphis_ or _Tursio_ _Lissodelphis_: The Right Whale Dolphin. All oceans. Genus _Grampus_ _G. griseus_: Risso’s Dolphin. North Atlantic, Mediterranean, New Zealand, and Cape of Good Hope; 12 to 13 feet. Genus _Cephalorhynchus_ These are the Southern, mostly cold-water dolphins. _C. heavisidei_: Heaviside’s Dolphin. Cape of Good Hope; about 4 feet. _C. hectori_: Hector’s Dolphin. New Zealand; about 6 feet. _C. albiventris_: White-Bellied Dolphin. A very rare form, found off the coast of South America; about 4 feet 6 inches. _C. commersonii_: Commerson’s Dolphin; also known as the Piebald Porpoise or Le Jacobite. Southern oceans; up to 5¼ feet. Genus _Lagenorhynchus_ Characterized by great number of vertebrae (80 to 90), great length of transverse and vertical bony processes from vertebrae, moderately pointed high back fin having concave posterior border; the beak is short. _L. acutus_: The White-Sided Dolphin. North Atlantic; about 9 feet. _L. australis_: Peale’s Porpoise. Cape Horn, Chile, Patagonia, Falkland Islands; over 7 feet. _L. albirostris_: The White-Beaked Dolphin. North Atlantic; 9 to 10 feet. _L. cruciger_: South Pacific; 5 to 6 feet. _L. fitzroyi_: Fitzroy’s Dolphin. Southern end of South America; 5 feet 4 inches. _L. obscurus_: Dusky Dolphin. South Africa, New Zealand, Falkland Islands; 7 feet. Genus _Sotalia_ Concentrated in the tropical seas or rivers of South America, Africa, India, and the Far East. _S. pallida_: Buffeo blanco. Upper Amazon; 5 feet 6 inches. _S. fluviatalis_: Buffeo negro. Upper Amazon; 3 feet 7 inches. _S. tucuxi_: Upper Amazon. _S. guianensis_: N. E. coast of South America. _S. teuszii_: Noteworthy as being the one Cetacean believed to feed exclusively on vegetable matter. Kamerun River. _S. gadamu_: Vizagapatam; averages 7 feet; snout 6 inches. _S. lentigiosa_: Vizagapatam.