SPECIES ACCOUNTS 181 



Artificial Key to the Species of Ageneiosidae 181 



Family Ageneiosidae 186 



Genus Tetrcmematichthys Bleeker 187 



Tetranematichthys quadrifilis 188 



Genus y4geweio5i«LacepMe 199 



Ageneiosus brevis 204 



Ageneiosus piperatus 217 



Ageneiosus atronasus 225 



Ageneiosus pardalis 237 



Ageneiosus vittatus 250 



Ageneiosus n. sp 264 



Ageneiosus valenciennesi 276 



Ageneiosus ucayalensis 288 



Ageneiosus polystictus 307 



Ageneiosus brevifilis 317 



Ageneiosus mannoratus 337 



UTERATURE CITED 346 



BIOGRAPHICAL SKETCH 363 



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