MR. WILTON. "Captain Hall examined some coral reefs during the different stages of one tide, and gives the following description as the result:--'When the tide has left it for some time, it becomes dry, and appears to be a compact rock, exceedingly hard and rugged; but as the tide rises, and the waves begin to wash over it, the coral worms protrude themselves from holes that were before invisible. These animals are of a great variety of shapes and sizes, and, in such prodigious numbers, that, in a short time, the whole surface of the rock appears to be alive and in motion. The most common worm is in the form of a star, with arms from four to six inches long, which are moved about with a rapid motion, in all directions, probably to catch food. Others are so sluggish, that they may be mistaken for pieces of rock; and are generally of a dark color, from four to five inches long, and two or three round. When the coral is broken about high-water mark, it is a solid hard stone; but if any part of it be detached at a spot where the tide reaches every day, it is found to be full of worms of different lengths and colors, some being as fine as a thread and several feet long, of a bright yellow, and sometimes of a blue color; others resemble snails, and some are not unlike lobsters in shape, but soft, and not above two inches long.'" DORA. "We must be content to see these in imagination. But sometimes I feel disposed to regret that we are not _really_ afloat in the 'Research;' and at other times I congratulate myself that the voyage is only imaginary; for in Polynesia particularly, we have met with so many ignorant, savage people, it is well for us that we can, if we choose, steer clear of them. I suppose it would not be possible in all Europe to find a country where such unreasonable things were done from religious superstition?"