Fig. lOO. — OSTEOGLOSSIDS (oSTEOGLOSSIDAE) AND THEIR DISTRIBUTION. 



A. Ueterotis niloticus, X ^ ; b. Osteoglossum bicirrhosum, X J ; c. Arapaima gigas, 

 X ^6 ; D. Scleropages leichardti, X J. In the map the black area marked a represents 

 the distribution of the genus Heterotis, that marked b, c of Osteoglossum and 

 Arapaima, and that marked D of Scleropages. 



