In the British Museum there is the skin of a very young Seal, which was presented by Sir John Richardson as the Falkland Island Fur-Seal, with the observation appended that the adult is 5 feet long, and its skin is worth fifteen dollars. It is without its skull. The fur of this young Seal is dark brown, reddish beneath, and very like that of the young specimen sent by Capt. Abbott; but the hairs are smoother, and the white tips to them are longer and more marked, giving the animal a more grizzled appearance. There is another young Eared Seal, very like the former, which was received with General Hardwicke’s Collection (who, no doubt, purchased it of a dealer), said to have come from the Cape of Good Hope. I suspect this habitat must be erroneous; for it is very unlike what I recollect of the young Cape Eared Seals, which are called “Black Dogs,” on account of the blackness of their colour. Unfortunately we have no specimen of the latter in the Museum collection. General Hardwicke’s specimen only differs from Sir John Richardson’s in being less punctulated with white; fewer hairs have a white tip, and the tip is shorter. Both these young specimens differ from the half-grown one obtained from Capt. Abbott, in the fur being softer and smooth to the touch; and Capt. Abbott’s specimen differs from the adult in the length and greater crispness of its fur, the fur of the old one being harsh and hard and closer pressed. In the first essay, Dr. Peters places _Phoca falklandica_, Shaw, and _Otaria nigrescens_ together, with doubt, observing that one was known from the skin, and the other by the skull, overlooking the fact that the name _nigrescens_ implied that I had seen the colour of the fur, which was not that given by Shaw to his animal; in his second essay, Dr. Shaw’s, Dr. Burmeister’s, and my animal are all classed together without any doubt. The skull of Capt. Abbott’s Fur-Seal from the Falkland Islands shows that it was a very young animal, which had only developed its first grinders, the permanent series being developed below them. The tentorium is bony and well developed. The teeth are the same in position and number as they are in the adult skull; and the upper ones, as far as developed, are small and conical, except the fifth upper grinder, which is largest, triangular, with a single subconical lobe on the base of the hinder edge of the cone. The lower canines are small, scarcely larger than the cutting-teeth, which are nearly uniform in size. The lower grinders are of a much larger size than the upper ones in the adult skull, as if they belonged to the permanent series: they are of the same form as the teeth in adult skulls; but the central cone is higher and more acute, and the anterior and posterior lobes at the base of the cone are more developed and acute, the lobes of the last or fifth grinder being larger and rather on the inner surface of the tooth.