2. _Ridgewood, Kings County._—In 1885 (Trans. N. Y. Acad. Sci., vol. V, p. 15), Mr. D. S. Martin stated that some 15 or 20 years before that time a mastodon skeleton had been exhumed in excavating for the Ridgewood, Long Island, reservoirs. No details were furnished. 3. _Jamaica, Queens County._—In 1859 (Proc. Amer. Assoc. Adv. Sci., 12th meeting, 1858, p. 232), J. C. Brevoort reported the finding of 5 molar teeth and fragments of bones in removing pond-muck in the valley of a small stream which flowed into Baisley’s pond, near Jamaica. In the pond itself was a deposit of mud, in some places 6 feet deep, which rested on gravel. This deposit of mud, mixed with vegetable matter, is continued up the valley mentioned. The bones and teeth were found about 20 yards from the channel of the stream, resting on the gravel and covered by about 4 feet of the muck. According to Folio 83, of the U. S. Geological Survey, Jamaica and vicinity is situated on stratified drift which was laid down while the foot of the glacial ice was immediately north of the town. The mastodon must have lived there after the retreat of the ice from the island; it may have been a long time afterward. According to Fairchild, as above cited, this locality was submerged by the sea while the stratified materials were being laid down. 4. _Inwood, Nassau County._—In 1891 (Science, vol. XVIII, p. 342), Professor R. P. Whitfield noted the finding near Inwood of a fragment of what he regarded as a mastodon tusk. It was met in cutting a ditch in a peat-swamp. While the probability is that the tusk was that of a mastodon, it might have been that of one of the elephants. 5. _Riverhead, Suffolk County._—In 1842 (Zool. of New York, Mamm., p. 103), DeKay stated that in the year 1823 more than half of a lower jaw, with the teeth, of a mastodon had been found on the south beach, about 4 miles east of Riverhead, between high and low water. This fossil was mentioned by Dr. John M. Clarke in 1904 (N. Y. State Mus., Bull. 69, p. 923); also by J. C. Brevoort in 1859 (Proc. Amer. Assoc. Adv. Sci., vol. XII, p. 233). This vicinity was evidently submerged while the foot of the glacier was in Long Island. Only after the emergence of the island did the animal probably have its existence. 6. _Morrisania, New York County._—In 1885, Dr. N. L. Britton (Trans. N. Y. Acad. Sci., vol. V, p. 15) reported the discovery of a large portion of a mastodon’s tusk in a cellar excavation in Morrisania 3 years previously. Here, as in similar cases, one can not be certain that the tusk was not that of an elephant.