DISTRIBUTION AND MIGRATIONS 



271 



in Celebes, there is not a single indigenous true fresh-water 

 fish. It is true that there are certain widely distributed Indian 

 species in Celebes, as well as in Austraha and New Guinea, but 

 these are either estuarine fishes capable of crossing the sea, or 





Fig. 99. LUNG-FISHES (DIPNEUSTI) AND THEIR DISTRIBUTION. 



A. African Mud-fish (Protopterus aethiopicus),x about \ ; b. South American 

 Lung-fish (Lepidosiren paradoxa), X about | ; c. Australian Lung-fish 

 (Epiceratodusforsteri), X about y\j. In the map the black area marked a represents 

 the distribution of the genus Protopterus, that marked b of Lepidosiren, and that 

 marked c of Epiceratodus . 



air-breathing forms which can be carried about aHve in jars, 

 and may well have been transported from one island to another 

 by man. The only fishes of the order Ostariophysi in the Aus- 

 tralian region are certain fresh-water genera and species of 

 Cat-fishes, but these belong to two families {Ariidae, Plotosidae) 



