C. Matteuci, P. Pacini, T. Bilharz, and Max Schultze. The development and metamorphosis of the Lamperus was made the subject of research by H. Müller, M. Schultze, and P. Owsjannikow; Müller's examination of Branchiostoma was continued by J. Marcusen, A. Kovalevsky, L. Sticda, W. Müller, C. Hasse, T. Huxley, and F. M. Balfour. The most comprehensive accounts of the anatomy of fishes are contained in the following works:—
1. H. Stannius, "Zootomic der Fische," 2d edit. (Berl. 1854, 8vo.)
2. R. Owen, "Anatomy of Vertebrates," vol. i. (Lond. 1866, 8vo.)
3. R. Owen, "Lectures on the Comparative Anatomy and Physiology of the Vertebrate Animals." Part I. Fishes. (Lond. 1846, 8vo.)
4. T. Huxley, "A Manual of the Anatomy of Vertebrated Animals." (Loud. 1871, 16mo.)
Latest Systematic Works. It has been mentioned above that the great work of Cuvier and Valenciennes had been left incomplete. Several authors, therefore, supplied detailed accounts of the orders omitted in that work. Müller and Henle published an account of the Plagiostomes, and Kaup of the Murænidæ and Lophobranchii. A. Duméril, finally, commenced an "Histoire naturelle des Poissons ou Ichthyologie générale," of which, however, two volumes only appeared, containing a complete account of the "Plagiostomes" (Paris, 1865, 8vo), and of the "Ganoids and Lophobranchs." (Paris, 1870, 8vo.)
So great an activity had prevailed in Ichthyology since the publication of the "Histoire naturelle" by Cuvier and Valenciennes, and the results of the manifold enquiries were scattered over such a multitude of publications, that it became imperative to collect again all these materials in one comprehensive work. This was done in the "Catalogue of Fishes,"
