falling on the deck. We measured one of them and found its length to be 5-1/2 inches, circumference of the body 2 inches; the wings, situate near the gills, resemble in texture the wings of the bat, and measure, when stretched, 5 inches between the tips. In their flight they generally rise to 15 or 20 feet above the surface of the water, and fly about 150 yards at a time. As soon as their wings get dry they fall again into the water, and only fly to avoid their pursuers. They are the prey of the dolphin and other large fishes.
On the 6th of October we made one of the Cape de Verd Islands, on the coast of Africa. It proved to be Bonavista, in lat. 16° N. and long. 22° 47['] W. The land, covered with a blue haze, appeared broken, barren, and rocky. The weather was overcast, and we had heavy rain and thunder at the time. Near this place immense shoals of porpoises kept skipping {17} on the surface of the water going southwards. They were said to prognosticate the near approach of bad weather. We found the changes of the weather here very remarkable, from calm to rough, from foul to fair; clear, cloudy, wet, dry, hazy, and squally alternately, with the usual finale of mist and rain, and not unfrequently all these changes within the twenty-four hours.
After leaving the land, some of the gentlemen amused themselves one fine evening with shooting at a mark suspended from the ship's stern, under which a boat lay secured; soon afterwards, in the dusk of the evening, smoke was seen to issue from that quarter; the alarm of fire was given, and in an instant all the people assembled on deck in a state of wild confusion, some calling out to broach the water casks, others running to and fro in search
