3 MARCH 1832, Page 18

In our notice last week of the Fauna Boreali-Americana, we

endeavoured to give in brief space an idea of the Circular Theory of Nature, as taught by Mr. MAC LE AY, Mr. SWAINsoN, and others; in the course of which we alluded to the present immature state of the system, and stated, that "the mere form of these links [which appear to be binding all nature together] had only lately been suspected," and " had not certainly been arrived at." We meant to say—" and their exact composition had not been yet arrived at with certainty -" for, assuredly, if any thing is certain i about the matter, it is the form of these links, which s circular. As to the composition, whether it be quinary, ternary, or quater- nary, or otherwise, Mr. SWAINSON must pardon us if we continue to think that he has not yet quite " demonstrated " it, at least in the work in question.