| | | | | | | _Nematomorpha_ | | | | | | | _Nematoda_ | | | | | | | _Zoantharia_ Ctenophora _Rugosa_ _Acalephos_ _Alcyonaria_ COELENTERATA _Hydromedusae_ Actinozoa Hydrozoa | | | |-------- NEMERTEA | | | | +----------+ _Turbellaria_ ----------------| | PROTOZOA PLATYHELMINTHES _Corticata_ _Trematoda_ _Gymnomyxa_ _Cestoda_ | | | | Myxomycetes | _Triaronia_ | _Vobrocina_ _Calcarea_ _Foraminifera_ | PORIFERA Compound Protozoa _Demospongiae_ _Radiolaria_ Let me again emphasize the fact that the relationships of these diverging and re-diverging groups cannot be expressed on a flat surface. If we imagine a laurel-bush to be squashed flat by a horizontal plane descending upon it, we shall see that sundry of the upper branches and twigs which were previously close together will become remote, and that the relative positions of parts can remain partially true only with the minor branches. The reader must therefore expect to find some of the zoological divisions which in the order of nature are near one another, shown in the table as quite distant.