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1. Nordmann, "Ichthyologie Pontique," in "Voyage dans la Russie meridionale de Demidoff." (Tom. iii. Paris, 1840, 8vo, atlas fol.)

1. Heckel and Kner, "Die Süsswasser-fische der Oesterreichischen Monarchie." (Leipz. 1858, 8vo.)

2. C. T. E. Siebold, "Die Süsswasser-fische von Mitteleuropa." (Leipz. 1863, 8vo.)

1. Bonaparte, "Iconografia della Fauna Italica." Tom. iii. Pesci. (Roma, 1832-41, fol.) (Incomplete.)

2. Costa, "Fauna del Regno di Napoli." Pesci. (Napoli, 4to, about 1850.) (Incomplete.)

1. E. Blanchard, "Les Poissons des eaux douces de la France." (Paris, 1866, 8vo.)

The freshwater Fish-fauna of Spain and Portugal was almost unknown, until F. Steindachner paid some visits to those countries for the purpose of exploring the principal rivers. His discoveries are described in several papers in the "Sitzungsberichte der Akademie zu Wien." B. du Bocage and F. Capello contributed towards the knowledge of the marine fishes on the coast of Portugal. ( "Jorn. Scienc. Acad. Lisb.")

1. J. Richardson, "Fauna Boreali Americana." Part III. Fishes. (Lond. 1836, 4to.) The species described in this work are nearly all from the British possessions in the North.