Sauvage, _Histoire physique, naturelle et politique de Madagascar_, par A. Grandidier. xvi.; _Poissons_ (Paris, 1891). (R) OCEANIC FISHES: G. B. Goode and T. H. Bean, _Oceanic Ichthyology_ (Washington, 1895); A. Günther, _Deep-sea Fishes of the "Challenger" Expedition_ (London, 1887); C. H. Gilbert, "Deep-sea Fishes of the Hawaiian Islands," _Bull. U.S. Fish. Comm._ 23 (1905); R. Collett, _Norske Nordhavs Expedition: Fiske_ (Christiania, 1880); C. F. Lütken, _Dijmphna-Togtets Zoologisk-botaniske Udbytte: Kara-Havets Fiske_ (Copenhagen, 1886); L. Vaillant, _Expéditions scientifiques du "Travailleur" et du "Talisman": Poissons_ (Paris, 1888); A. Agassiz, _Three Cruises of the U.S. Coast and Geodetic Survey Steamer "Blake"_ (Boston and New York, 1888); A. Alcock, _Illustrations of the Zoology of H.M.S. "Investigator": Fishes_ (Calcutta, 1892-1899, in progress); A. Alcock, _Descriptive Catalogue of the Indian Deep-sea Fishes in the Indian Museum_ (Calcutta, 1899, contains references to all the previous papers of the author on the subject); R. Collett, _Résultats des campagnes scientifiques accomplies par Albert I^er prince de Monaco: poissons provenant des campagnes du yacht "l'Hirondelle,"_ (Monaco, 1896); R. Koehler, _Résultats scientifiques de la campagne du "Caudan,"_ (Paris, 1896); C. H. Gilbert and F. Cramer, "Report on the Fishes dredged in Deep Water near the Hawaiian Islands," _Proc. U.S. Nat. Mus._ xix. (Washington, 1896); C. Lütken, "Spolia Atlantica," _Vidensk. Selsk. Skr._ vii. and ix. (Copenhagen, 1892-1898); C. Lütken, _Danish Ingolf Expedition_, ii.: _Ichthyological Results_ (Copenhagen, 1898); S. Garman, "Reports on an Exploration off the West Coast of Mexico, Central and South America, and off the Galapagos Islands in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer "Albatross," during 1891," _Mem. Mus. Comp. Zool._ vol. xxiv. (Cambridge, U.S.A., 1899). (S) ANTARCTIC FISHES: G. A. Boulenger, _Report on the Collections made during the voyage of the "Southern Cross": Fishes_ (London, 1902); L. Dollo, _Expédition Antarctique Belge_ (S.Y. "Belgica"). _Poissons_ (Antwerp, 1904); E. Lönnberg, _Swedish South Polar Expedition: Fishes_ (Stockholm, 1905); G. A. Boulenger, _Fishes of the "Discovery" Antarctic Expedition_ (London, 1906). (G. A. B.) III. DEFINITION OF THE CLASS _Pisces_. ITS PRINCIPAL DIVISIONS