THIRD EDITION.
NEW YORK
D. APPLETON AND COMPANY
1895
PREFACE.
THE plan I have followed in this work has been to sift and arrange the facts I have gathered concerning the habits of the animals best known to me, preserving those only, which, in my judgment, appeared worth recording. In some instances a variety of subjects have linked themselves together in my mind, and have been grouped under one heading; consequently the scope of the book is not indicated by the list of contents: this want is, however, made good by an index at the end.
It is seldom an easy matter to give a suitable name to a book of this description. I am conscious that the one I have made choice of displays a lack of originality; also, that this kind of title has been used hitherto for works constructed more or less on the plan of the famous Naturalist on the Amazons. After I have made this apology the reader, on his part, will readily admit that, in treating of the Natural History of a district so well known, and often described as the southern portion of La Plata, which has a temperate climate, and where nature is neither exuberant nor grand, a personal narrative would have seemed superfluous.
The greater portion of the matter contained in