As to mammoths and elephants--the former is a misspelling of the word “mammont,” the name given by the natives of Northern Siberia to the extinct elephant, hairy, but otherwise closely similar to the Indian elephant, which within the period of prehistoric man (50,000 to 150,000 years) was abundant over the whole of the northern part of the Northern Hemisphere. Mammoths’ tusks (ivory) are still largely imported from Siberia. The biggest African elephant may, perhaps, stand 13ft. at the shoulder. No mammoth or other extinct elephant seems to have exceeded this. The stuffed African elephant in Cromwell road measures 11ft. 2in. at the shoulder. Mr. Carnegie’s great extinct reptile Diplodocus is only 12ft. 9in. from the ground at the highest part of its back. The biggest tusk of a recent elephant ever seen was bought by me for the Natural History Museum seven years ago. It weighs 228lb., and measures 10ft. 2in. along the curve. It was recognised three years ago by Mr. Jephson (one of Stanley’s companions) as one of a pair which he had weighed in Central Africa. It was in the possession of Emin Pasha when that unfortunate gentleman was “rescued” by Stanley and Jephson. After the subsequent assassination of Emin, his ivory treasure found its way to Zanzibar, and this tusk being part of it, was sold and brought to London. A real new monster of great size is the carnivorous reptile described by Professor Osborne, of New York, as Tyrannosaurus. There is no mistake or exaggeration about this report. The specimen is in the New York Museum, and has been described in detail and drawn to scale by Professor Osborne. The skeleton stands up like that of a huge bird or a kangaroo on the two hind legs--as does that of the vegetarian reptile Iguanodon. The Iguanodon and the Tyrannosaurus are of about the same height, namely 17ft. But the new monster has enormous tiger-like teeth, twelve on each side of the jaw, above and below, and the jaws are three feet long, whilst the whole head is broad and short. Iguanodon, on the other hand, has been long known from English and Belgian rocks, and can be seen in Cromwell Road. It has a beak like a tortoise, and the small teeth of a vegetable-feeder. Both animals had very short front limbs or arms, but in Tyrannosaurus these are really ridiculously out of proportion, according to more familiar standards, for the whole arm is not bigger than one of the toes of the hind foot. This new giant carnivorous reptile is found in rocks of the same age as our greensand and chalk in Wyoming, U.S.A. It preyed upon huge vegetable-eating reptiles, the remains of which are found in the same strata, and have been reconstructed.