The publication under review is bound separately as the second part of Volume I of a comprehensive system of zoölogy prepared by a large group of distinguished French investigators. The work as a whole and in each division of the Animal Kingdom is designed to include anatomic, systematic and biologic data. Part I of Volume I provides a general introduction, a special introduction to the protozoa and a consideration of the flagellate protozoa. Part II of Volume I presents the super-classes Rhizopoda, Actinopoda, Sporozoa and Cnidosporidia. Volume II (in preparation) will consider the Ciliata and “the cell.”

The Rhizopoda are divided into three classes, Lobosa, Filosa and Granulo-reticulosa (based on the classification of De Saedeleer, 1934), although it is admitted by the editor-in-chief that these groupings, particularly the third one, are not wholly satisfactory. The Lobosa comprehend the Amoebaea, which have a naked protoplast, and the Testacealobosa, which are provided with a theca or shell.