The Whale has still another deadly enemy—the tribe of Bloodheads, known as the Wolves of the ocean. This is a species of Whale and, like the Whale, also belongs to Mammalian animals. Although the Bloodheads in relation to the enormous Whale may be termed small, they wage war in troups of five or ten, undaunted and impassionately attacking the huge monster who usually succumbs to the assault. They, therefore, deserve the name assigned them by Linneus, “Torment of the Whale.” They are even more blood-thirsty than the Shark in boldness, killing Seal and smaller Fish in masses. The Whale when attacked by these Fish of Prey appears to become at first paralyzed with fear and hardly makes any effort to defend himself, although it would hardly benefit him to do so as the Bloodheads are the swiftest of the Whale family, swimming with extraordinary quickness and dexterity. The “Wolves of the Sea” encircle the gigantic, clumsy Whale like a pack of Hounds around a pursued and exhausted Deer. Some of them attack him at the head and forefins, others attack him from underneath, while others attack the lips, and when he opens his gigantic mouth, attempt to slash apart his tongue. Finally the giant becomes angered. He whips the water with his tail and his front fins with tremendous force, snorts powerful streams out of the nostrils of his colossal head; dives under and shoots up in an endeavor to shake off his enemies and to dispatch them with his fins. Often this terrific combat, as illustrated on page 88, lasts for a considerable length of time, ending mostly with the downfall and death of the Whale. The Bloodheads tear him apart in a horrible manner until death ensues, after which they feast for days with pleasure on the immense carcass, and then start in search of further prey. THE CACHALOTS. [Illustration: SPERM WHALE.] In these Cetaceans the head is of vast size and excessively vaulted, or arched, especially in front. The upper jaw has no whalebone nor teeth of any kind, excepting a few rudiments. The lower jaw, which is very narrow and much elongated, is armed on each side with a lengthy row of teeth of considerable size and conical shape, the points of which when the mouth is shut, are received into corresponding depressions in the upper jaw. The upper region of their prodigious head is made up of vast caverns filled with an oily fluid, which on cooling becomes solid, constituting the valuable substance generally known by the name of “spermaceti.” It is not, however, in the vaults of the head only that this fat is found. It appears to be distributed through various excavations in the body, and to be diffused even among the dense mass of blubber which envelopes the exterior of the animal. The peculiar odorous substance, so well known under the name of “ambergris,” is likewise obtained from the Cachalot.