in the sea; after death the back was exactly the colour of “dark blue Welsh slates.” Under parts white. The animal was a female. On making subsequent inquiry about the white stripes usually present as a distinguishing character of Risso's Grampus, I was informed that “it had little faint gray streaky marks, ⅛ inch in width, and some were long, and some were short,” but as Mr. Wright had to prompt his informant on this point, I conclude these marks must have been inconspicuous. When requested by Mr. Wright, the lower jaws were very kindly presented to me by Mr. Blake. Before removing the mass of adherent flesh, I made a close examination of the dentition. Taking the left mandible, I found embedded in the flesh, at the point of the jaw in front of the three mandibular teeth, a couple of very small denticles, so soft as to be scarcely calcified, and quite easily cut through with the knife. They appeared on the surface as roughish points hardly to be seen, but easily felt with the finger. Then behind the three mandibular teeth were at regular intervals two small openings into the gum. These were about the diameter of an ordinary knitting wire. On shaving slices off the gum these openings were seen to widen out into tooth sacs of the calibre of an ordinary lead-pencil, and half an inch deep, and they were quite filled with a very soft, white, pasty substance with no signs whatever of calcification, except in the walls of these sacs, which were of tolerably hard cartilaginous matter, harder than the surrounding gums. The two front denticles had small, rough, shallow sockets in the bone, but the tooth sacs described had no visible sockets in the bone of the jaw, as was ascertained when the flesh was all removed. The right jaw had the couple of small denticles, the three mandibular teeth, and the two tooth sacs in the same order and position as on the left jaw. The mandibular teeth seemed remarkably loose in their sockets, and with the finger and thumb could be moved quite easily in any direction, the great depth and width of the sockets when compared with the size of the teeth perhaps accounting for this. Each of them was exactly half an inch above the gums; when removed from their sockets and cleaned, the front one on each side measured 1⅛ inch in total length, the others were all alike
