text:  We will now take some of the most interesting instances given by Dr Prichard of structural changes and hereditary instincts acquired by domesticated animals and again lost by them on returning to a wild state:-- "Swine transported from Europe to America since the discovery of the western continent by the Spaniards in the fourteenth century and wandering at large in the vast forests of the New World and feeding on wild fruits have resumed the manner of existence which belonged to the original stock