. Animal aggregations, a study in general Animal ecology. 356 ANIMAL AGGREGATIONS than special biological significance? Chart I gives a diagrammatic list of the portions of the animal kingdom in which this principle of automatic co-operation has been demonstrated to date. CHART I DiPHYLETic Tree, of Relationships within the Animal Kingdom* Birds Mammals Insecta Cephalochordata Urochordata Hemichordata CHORDATA. kingdom PROTOPHYTA Primitive plants / PRIMITIVE PLANT-ANIMAL '? Phyla are given in larger, classes in smaller, Please note that these images are extracted from sc


. Animal aggregations, a study in general Animal ecology. 356 ANIMAL AGGREGATIONS than special biological significance? Chart I gives a diagrammatic list of the portions of the animal kingdom in which this principle of automatic co-operation has been demonstrated to date. CHART I DiPHYLETic Tree, of Relationships within the Animal Kingdom* Birds Mammals Insecta Cephalochordata Urochordata Hemichordata CHORDATA. kingdom PROTOPHYTA Primitive plants / PRIMITIVE PLANT-ANIMAL '? Phyla are given in larger, classes in smaller, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Allee, W. C. (Warder Clyde), 1885-1955. Chicago : The University of Chicago Press


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