562 THE AGE OF MAMMALS 



Fam. Argyrocetidae. Argyrocetids. 



"f- Argyrocelus. U. Mioc, S. Ainer. 

 Fam. Platanistidae. River Dolphins. 



Pldlanisla. Susu, Ganges Dolpliiii. Rivers of India, Burma, 



Assam. 



Inia. Iiiia, Amazon Doli)liiii. Amazon, Orinoco, etc. 



Stetiodelp/iis. La Plata Dolpliin. La Plata, Rio Grande do Sul. 



Fam. Delphinidae. Dolphins, Porpoises, Killers, etc. 



Sotalia. AVhite River Dolphin. Ind. Oc, W. Afr., Guiana, Brazil. 



Steno. Rough-toothed Dolphin. Atlant., Pacif., Ind. Oc. 



Tursiops. Bottle-nosed Dolphin. Pacif., Atlant., Medit. & Red 

 Sea, Lid. Oc. 



De/phinus. Dolphin. Cosmopolitan in Oceans. 



Larjenorhynchus. Spectacled Dolphin. Atlant. & Pacif. (X. & 

 S.), Ind. Oc. 



Phoccena. Porpoise. Atlant. & Pacif. (N. & S.), Medit. Sea. 



Orcella. Orcella, Irawadi Dolphin. Rivers of Bengal, Burma, 

 Borneo. 



Grampus. Grampus. N. Atlant., Pacif., Ind. Oc, Medit. Sea. 



Glohicephalus. Ca'ing ' Whale,' Blackfish. Atlant., Pacif., Ind. 

 Oc, Medit. Sea. 



Pseudorca. Lesser Killer. Cosmopolitan in Oceans. 



Orca. Killer ' Whale.' Cosmopolitan in Oceans. 



Fam. Delphinapteridae. Belugas and Narwhals. 



Delphinapterufi. Beluga. Arctic, Atlant., N. Pacif. Oc. 



N Motwdon. Narwhal. Arctic, N. Atlant. (W.) Oc. 



Fam. Physeteridae. Sperm Whales and Beaked Whales. 



Subfam. Physeterinse. Sperm Whales. 



f Physodon. U. Eoc, S. Amer. ; Mioc, Eur. 



Physeter. Sperm Whale. Atlant., Pacif., Ind. Oc. 



Cofpa. Pygmy Sperm Whale. Pacif., Ind., S. Atlant. Oc. 



Subfam. Ziphiinse. Beaked Whales. 



Hyperoodon. Bottle-nose Whale. N. Atlant., Medit. Sea, S. 

 Pacif., Antarctic Oc. (Plioc, Eur.). 



Ziphius. Two toothed Whale. Cosmopolitan in Oceans. 



Mesoplodnn. Cow Fish. Atlant., Pacif., Ind. Oc. (Plioc Eur.; 

 Pleist., N. Amer.). 



Berardius. New Zealand Two-toothed Whale. S. Pac Oc. near 

 N. Zealand. 



