Porpoises are valuable for their jaw oil, hides and body blubber, the value of each being in the order given. The oil derived from the jaws represents the greater part of the value, being worth ordinarily twenty dollars a gallon, refined. It is extracted from the broad posterior branches of the lower jaw, and is universally used for the lubrication of watches, clocks and similarly delicate mechanisms. An attempt was made at the Hatteras fishery to utilize the carcasses of these animals for fertilizer, but, as the location is isolated, the question of fuel for the furnace proved too serious and the project was abandoned. The Bottle-nosed Porpoise (_Tursiops truncatus_) is the only species of porpoise that has ever been taken at the Hatteras fishery. Our eight-foot specimens represent the average size. A number of animals were measured in November, however, which exceeded nine feet in length. The greatest length for this species at Hatteras is twelve feet, but this is altogether unusual. Measurements and weights taken in November show that a porpoise five and a half feet long weighs 100 pounds; six feet, 160 pounds; seven feet, 200 pounds; and eight feet, 300 pounds. The movement of porpoises along the great beach which extends in a general southwesterly direction from Cape Hatteras is usually close to the surf. The bands appear to move in both directions. Residents of Hatteras are of the opinion that the majority of those in the vicinity of Hatteras Inlet move to the eastward, turning south from the Cape, whence they gradually swing back to the mainland. They have not, however, been followed away from the beach, and their winter movements are not known with certainty. Immediately after their capture at Hatteras, where they were brought to land with a large drag-seine, the porpoises were placed for twenty-four hours in a deep salt water pond just back of the ocean beach. Here they had an opportunity to recover somewhat from the fright of capture, and to rest in cool water. No chances whatever were taken in the matter of temperature. On the beach their natural warmth of body would no doubt have been greatly increased by the hot sunshine. The following day they were seined out of the pond and placed in the shipping tanks, which were then hoisted on board a schooner and at once filled with water. During the voyage through the fresh waters of Pamlico Sound and the Great Dismal Swamp Canal, the water in the tanks was changed whenever it became warm. After reaching the New York steamer at Norfolk the cooling of the porpoise tanks en route was greatly simplified by the use of the steamer’s salt water hose.