The head of the whale presents in front a thick, blunt appearance, and constitutes about one third the length of the animal. At its junction with the body is a protuberance on its back, called the “bunch of the neck;” immediately back of this is the thickest part of the body. It then gradually tapers for about another third of the whole length, when the “small,” as it is called, commences; and at this point on the back is another and larger prominence of a pyramidal form, called the “hump,” from which a series of smaller prominences runs half way down the small, forming the “ridge.” The body then contracts so much as to become not larger than the body of a man, and terminates by being expanded on the sides into the “flukes,” or tail. The flukes resemble somewhat in shape the tail of a fish, only being placed horizontal instead of perpendicular. In the larger whales these flukes are from eight to ten feet in length, and from fourteen to sixteen feet in breadth. The depth of the head and body is greater than the width. At the angle formed by the superior and anterior surfaces of the head, a little on the left side, is the nostril, or “spout-hole,” which, in the dead animal, presents the appearance of a slit, or fissure, in form resembling an S, extending longitudinally, and about twelve inches in length. The “case,” situated in the upper part of the head, is a large, almost triangular-shaped cavity, lined by a beautiful glistening membrane, and covered by a thick layer of muscular fibres and tendons running in various directions, and finally united by common integuments. This cavity is for the purpose of containing and secreting an oily fluid, which after death concretes into a granulated substance of a yellowish-white color—the spermaceti. The quantity of fluid contained in the case depends on the size of the whale; from that of a large whale fifteen barrels of liquid spermaceti are often taken. Immediately beneath the case, and projecting beyond the lower jaw, is situated the junk, which is composed of dense cellular tissue, strengthened by numerous strong tendons and fibres, and infiltrated with spermaceti. The mouth is at the base of the head, and continues nearly its whole length. The lower jaw is pointed in front, and gradually widens till it is received in the socket of the upper jaw. It contains forty-two teeth, conical in shape, and, in the large whale, formidable in appearance. There are none, however, in the upper jaw, but indentations which receive the points of those in the lower jaw. Sometimes a few rudimentary teeth are found in the upper jaw, never, however, projecting beyond the gums, upon which those in the lower jaw strike when the mouth is closed. The tongue is of a white color, exceedingly small, and does not appear to possess the power of very extended motion.