Papers on Fishes of South and Middle America

Acara adipose fin Amazon anal ray Arroyo Trementina Astronotus Astyanax Asuncion base of caudal Bloch Boulenger Brit C. M. Cat Carnegie Museum Catalog Catalog of Fishes caudal lobe caudal peduncle caudal spot chromatophores Corumba Cotypes Cuvier dentary depth dorsal ray dorsal spine dusky Eigenmann Eigenmann & Eigenmann Eigenmann & Kennedy equal Essequibo River fauna front genera genus Geophagus Gill Gill-rakers Guenther Guiana Günther Gymnotus head Heckel humeral spot I. U. Cat interorbital Kner lateral line length Linnæus Loricaria lower jaw margin maxillary barbels median series middle caudal rays naked Occipital process opercle orbital origin of anal Origin of dorsal Pimelodus Plate Plecostomus posterior Potaro Potaro River premaxillary Proc Rio Negro Rio Paraguay series of scales sides silvery lateral band slightly species specimens Steindachner Sternarchus teeth Tetragonopterus tip of snout Type U. S. Nat upper Valenciennes ventral profile ventrals