The different kinds of water in France are carefully considered, and only fish suitable for them placed therein. In marshy places eels alone are deposited, whilst in bright and rapid waters trout and other suitable fish are now to be found in great plenty. Attention is at present being turned to sea-fish, and the latest “idea” that has been promulgated in connection with the cultivation of sea-animals is turtle-culture. The artificial multiplication of turtle, on the plan of securing the eggs and protecting the young till they are able to be left to their own guidance, is advocated by M. Salles, who is connected with the French navy, and who seems to have a considerable knowledge of the nature and habits of the turtle. To some extent turtle-culture is already carried on in the island of Ascension—so far at least as the protection of the eggs and watching over the young is concerned. M. Salles proposes, however, to do more than is yet done at Ascension; he thinks that, to arrive quickly at a useful result, it would be best to obtain a certain number of these animals from places where they are still abundant, and transport them to such parks or receptacles as might be established on the coasts of France and Corsica, where, at one time, turtles were plentiful. Animals about to lay would be the best to secure for the proposed experiments; and these might be captured when seeking the sandy shores for the purpose of depositing their eggs. Male turtles might at the same time be taken about the islets which they frequent. A vessel of sufficient dimensions should be in readiness to bring away the precious freight; and the captured animals, on arriving at their destination, should be deposited in a park chosen under the following considerations:—The formation of the sides to be an inclosure by means of an artificial barrier of moderate height, formed of stones, and perpendicular within, so as to prevent the escape of the animals, but so constructed as to admit the sea, and, at the same time, allow of a large sandy background for the deposition of the eggs, which are about the size of those laid by geese. As the turtles are herbivorous, the bottom of the park should be covered with sea-weeds and marine plants of all kinds, similar to those the animal is accustomed to at home. A fine southern exposure ought to be chosen for the site of the park, in order to obtain as much of the sunshine as possible, heat being the one grand element in the hatching of the eggs. Turtles are very fond of sunshine, and float lazily about in the tropical water, seldom coming to the shore except to lay. This they do in the night-time: crawling cautiously ashore, and scraping a large hole in a part of the sand which is never reached by the tide, they deposit their eggs, and carefully cover them with the sand, leaving the sun to effect the work of quickening them into life.