Note. The majority of the illnstratioiis are smaller than the adult fishes 

 they represent: those imnibered as follows arc, however, laro'er than in nature: 



Fig. 1, 55, 56, 62, 63, 78, 7!). SO. SI. S4. !)!, !)4, 95, 118. 119, 121, 122, 123, 

 141, 150, 230, 233, 234, 235, 237, 240, 244. 251, 252, 253. 300, 301, 302, 304. 



Corrections. Page 5, line 15, after CydostoiHiifd read Pluyiostomi. 

 Page 46, line 2, for Family Siliirichic read Plotosidac. 



