would prefer writing it, mandible, exceeds the upper about three-fourths of an inch. Both were furnished with single rows of divided conical teeth, about one-half an inch in length, so parted as to admit those of the upper jaw between each of those of the lower. The fish might weigh about two hundred pounds. The eyes were small in proportion to the size of the animal, and having a breathing aperture above, of course it had no gills. Porpoises move in large companies, and generally during spring and early summer go in pairs. I have seen a parcel of them leap perpendicularly about twenty feet, and fall with a heavy dash in the sea. Our captain told us that there were instances when small boats had been sunk by one of these heavy fish falling into them. Whilst I am engaged with the finny tribe (of which, however, I know little or nothing), I may as well tell you that one morning when moving gently, two miles per hour, the captain called me to show me some pretty little fishes just caught from the cabin window. These measured about three inches, were broad, and moved very quickly through the water. We had pin-hooks, and with these, in about two hours, three hundred and seventy were caught; they were sweet and good as food. They are known ordinarily as Rudder-fish, and always keep on the lee side of the rudder, as it affords them a strong eddy to support them, and enable them to follow the vessel in that situation; when calm they disperse about the bow and sides, and then will not bite. The least breeze brings them all astern again in a compact body, when they seize the baited hook the moment it reaches the water. We have also caught two Sharks, one a female about seven feet long, that had ten young, alive, and able to swim well; one of them was thrown overboard and made off as if well accustomed to take care of himself. Another was cut in two, and the head half swam off out of our sight. The remainder, as well as the parent, were cut in pieces for bait for Dolphins, which are extremely partial to that meat. The weather being calm and pleasant, I felt desirous to have a view of the ship from a distance and Captain Hatch politely took me in the yawl and had it rowed all round the "Delos." This was a sight I had not enjoyed for twenty years, and I was much pleased with it; afterwards having occasion to go out to try the bearings of the current, I again accompanied him, and bathed in the sea, not however without some fears as to Sharks. To try the bearings of the current we took an iron pot fastened to a line of one hundred and twenty fathoms, and made a log-board out of a barrel's head leaded on one side to make it sink perpendicularly on its edge, and tried the velocity of the current with it fixed to a line _by the help of a second glass_,[65] whilst our iron pot acted as an anchor.