other features; the extremely longsnouted Arabian 

 Sea form, D. d. tropicalis van Bree, 1971, may be a 

 distinct species (van Bree and Purves 1972). 



Genus LAGENODELPHIS Fraser, 1956 



Lagenodelphis hosei Fraser, 1956 (shortsnouted 



whitebelly dolphin). 

 Tropical and warm temperate waters of Indian and 

 Pacific oceans. Recorded from Natal, Japan, 

 Taiwan, Philippines, Borneo, northeastern Aus- 

 tralia, and the central and eastern tropical Pacific. 



Genus LAGENORHYNCHUS Gray, 1846 



This genus contains two well-defined species in the 

 North Atlantic and another in the North Pacific. Bier- 

 man and Slijper (1947, 1948) regarded all Southern 

 Hemisphere forms as conspecific, but Fraser (1966) 

 showed that there are three distinct species. The species 

 electra is now placed in a separate genus, 

 Peponocephala. 



Four species are recognized (Harmer 1922). 



Cephalorhynchus commersonii (Lacepede, 1804) 



(piebald dolphin; Jacobite). 

 Atlantic coast of South America from Golfo San 

 Matias to Tierra del Fuego; Falkland Islands; South 

 Georgia; and Kerguelen Island. 



Cephalorhynchus eutropia (Gray, 1846) (black dol- 

 phin; Chilean dolphin). 

 Coast of Chile between lat. 37° and 55°S. 



Cephalorhynchus heavisidii (Gray, 1828). 

 Coastal waters from Cape of Good Hope north to 

 Cape Cross, South West Africa (P. B. Best, pers. 



Cephalorhynchus hectori (van Beneden, 1881) (pied 

 dolphin; whitefront dolphin). 

 Coastal waters of New Zealand. 



Genus LISSODELPHIS Gloger, 1841 



Lagenorhynchus albirostris (Gray, 1846) (whitebeak 



dolphin). 

 North Atlantic from Davis Strait and Newfound- 

 land east to the Barents Sea and North Sea (rarely 

 to the southern British Isles). 



Lagenorhynchus acutus (Gray, 1828) (Atlantic 



whiteside dolphin). 

 North Atlantic from Massachusetts and southern 

 Greenland east to western Norway and the British 

 Isles. 



Lagenorhynchus obliquidens Gill, 1865 (Pacific 



whiteside dolphin: hookfin dolphin). 

 Waters off the coast of North America from 

 southeastern Alaska to Baja California, and off the 

 coast of Asia from the Kuril Islands to Japan. 



Lagenorhynchus obscurus (Gray, 1828) (dusky dol- 

 phin). 

 Temperate waters off South America, South Africa, 

 Kerguelen Island, southern Australia, and New 

 Zealand. Primarily a coastal species. 



Lagenorhynchus australis (Peale, 1848) (blackchin 

 dolphin). 



Temperate waters off southern South America and 



the Falkland Islands. 



Lagenorhynchus cruciger (Quoy and Gaimard, 1824) 



(hourglass dolphin). 

 Temperate waters of the Southern Ocean. A pelagic 

 species, found chiefly in waters immediately north of 

 the Antarctic Convergence. 



Genus CEPHALORHYNCHUS Gray, 1846 



The two species of this genus differ, as far as is known, 

 mainly in color pattern, and they should perhaps be 

 regarded as subspecies of a single species. 



Lissodelphis borealis (Peale, 1848) (northern right- 

 whale dolphin). 

 Temperate waters of the North Pacific from Japan 

 and the Kurils to British Columbia and California. 

 Individuals from Japan with a variant color pattern 

 have been named L. b. albiventris Nishiwaki, 1972. 



Lissodelphis peronii (Lacepede, 1804) (southern right- 

 whale dolphin). 

 Temperate waters of the Southern Ocean. 



Genus GRAMPUS Gray, 1828 



Grampus griseus (G. Cuvier, 1812) (whitehead gram- 

 pus; gray grampus). 

 All temperate and tropical seas. 



Genus PEPONOCEPHALA Nishiwaki and Norris, 1966 



Peponocephala electra (Gray, 1846) (little blackfish; 

 many-toothed blackfish; melon-head blackfish). 

 Tropical Atlantic, Indian, and Pacific oceans. 



Genus FERES A Gray, 1871 



Feresa attenuata Gray, 1875 (pygmy killer whale). 

 Tropical and warm temperate waters of the Atlan- 

 tic, Indian, and Pacific oceans. 



Genus PSEUDORCA Reinhardt, 1862 



Pseudorca crassidens (Owen, 1846) (false killer whale). 

 All temperate and tropical seas. 



