This creature, though I could never meet with more then one of them, and so could not make so many examinations of it as otherwise I would, I did notwithstanding, by reason of the great curiosity that appear’d to me in its shape, delineate it, to shew that, in all likelihood, Nature had crouded together into this very minute Insect, as many, and as excellent contrivances, as into the body of a very large Crab, which exceeds it in bulk, perhaps, some Millions of times; for as to all the apparent parts, there is a greater rather then a less multiplicity of parts, each legg has as many parts, and as many joints as a Crabs, nay, and as many hairs or brisles; and the like may be in all the other visible parts; and ’tis very likely, that the internal curiosities are not less excellent: It being a general rule in Nature’s proceedings, that where she begins to display any excellency, if the subject be further search’d into, it will manifest, that there is not less curiosity in those parts which our single eye cannot reach, then in those which are more obvious. * * * * * Observ. LII. _Of the small Silver-colour’d _Book-worm_._ As among greater Animals there are many that are scaled, both for ornament and defence, so are there not wanting such also among the lesser bodies of Insects, whereof this little creature gives us an Instance. It is a small white Silver-shining Worm or Moth, which I found much conversant among Books and Papers, and is suppos’d to be that which corrodes and eats holes through the leaves and covers; it appears to the naked eye, a small glittering Pearl-colour’d Moth, which upon the removing of Books and Papers in the Summer, is often observ’d very nimbly to scud, and pack away to some lurking cranney, where it may the better protect itself from any appearing dangers. Its head appears bigg and blunt, and its body tapers from it towards the tail, smaller and smaller, being shap’d almost like a Carret. This the _Microscopical_ appearance will more plainly manifest, which exhibits, in the third _Figure_ of the 33. _Scheme_, a conical body, divided into fourteen several partitions, being the appearance of so many several shels, or shields that cover the whole body, every of these shells are again cover’d or tiled over with a multitude of thin transparent scales, which, from the multiplicity of their reflecting surfaces, make the whole Animal appear of a perfect Pearl-colour.