Since the preceding part of this treatise had mostly passed through the press, I have had an opportunity of consulting some recently published works, which contain accounts, illustrated by figures, of many very interesting animals belonging to several of the Classes of which I have there treated; and all of which more or less demonstrate a presiding Intelligence immediately connected with the globe that we inhabit, and who, viewed under every aspect, evidently careth for us, and all the creatures he has made. I shall select a few of these for the consideration of the reader.

I formerly observed that types representing some of the higher forms of the animal kingdom were often to be detected amongst those belonging to its lowest grade: a remarkable instance of this may be seen in one of Ehrenberg's late works, in which is described and figured a singular Polygastric Infusory, which seems to exhibit the first outline of an Arachnidan form; it has eight locomotive organs or bristles, representing the eight legs of those animals. By means of these organs, this animal, which was found by Dr. Ehrenberg in the Red Sea, performs a double rotatory movement, one by the rotation of the anterior pair, and the other by the three posterior pairs.