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 io8 Bird -Lore or of the Woodcock, which find their landing place in Jersey, is well known to the peasants, who capture them by the thousand. It would be sufficient for the poor birds to baffle their enemies only to change the route of their direction a few kilometers. But they cannot do so ; they are fatally bound to the aerial way followed in the preceding journey and cannot leave it without losing them- selves. It is just so with other animals. Fish are cantoned. Certain of them have, like the migratory birds, two or three domains that they occupy successively. To go from one to another they emigrate in a mass, and follow routes of which the traces are subject to the rules we have set forth for the migration of birds. The relentless war that fishermen with a knowledge of their habits make upon them has never caused them to change their itinerary. Our theory of orientation seems, therefore, applicable to animals of all kinds. It permits us to arrange and explain in a very satis- factory manner a number of facts observed and known for a long time. ( To be concluded. ) CATBIRD ON NlJsF Photographed from nature by A J. Pennock, at Lansdowne, Pa, July,