Here, also, I saw those crabs which have shells only on the front of their bodies, but no shell whatever on their remarkably tender tails, so that, in order to find a protection to them, they thrust them into the empty shells of wilks, or some such fish, and when they grow too big for one, change into another.

But, most curious of all, I saw an animal which had the wonderful power, when it became ill, of casting its stomach and its teeth away from it, and getting an entirely new set in the course of a few months! All this I saw, and a great deal more, by means of my tank and my burning-glass, but I refrain from setting down more particulars here, as I have still much to tell of the adventures that befell us while we remained on this island..