prove of interest to the class of society in which the author moved. Salviani's work is of a high standard, most remarkable for the age in which he lived. It could not fail to convey valuable instruction, and to render Ichthyology popular in the country to the fauna of which it was devoted, but it would not have advanced Ichthyology as science generally; and in this respect Salviani is not to be compared with Rondelet or Belon.
Rondelet.
G. Rondelet (1507-1557) had the great advantage over Belon in having received a medical education at Paris, and more especially in having gone through a complete course of instruction in anatomy as a pupil of Guentherus of Andernach. This is conspicuous throughout his works—"Libri de Piscibus marinis" (Lugd. 1554, fol.); and "Universæ aquatilium historiæ pars altera" (Lugd. 1555, fol.) Nevertheless they cannot be regarded as more than considerably enlarged editions of Belon's work. For although he worked independently of the latter, and differs from him in numerous details, the system adopted by him is characterised by the same absence of the true principles of classification. Rondelet had a much more extensive knowledge of details. His work is almost entirely limited to European, and chiefly Mediterranean, forms, and comprises not less than 197 marine and 47 freshwater fishes. His descriptions are more complete and his figures much more accurate than those of Belon; and the specific account is preceded by introductory chapters in which he treats in a general manner on the distinctions, the external and internal parts, and on the economy of fishes. Like Belon, he had no conception of the various categories of classification—for instance, confounding throughout his work the terms "genus" and "species;" but he had intuitively a notion of what his successors called a "species," and his principal object was to collect and give as much information as possible of such species.
