3. _Pittsford, Monroe County._—In 1842 (Zool. New York Mamm., p. 101, plate XXXII, fig. 2), J. E. De Kay described, under the name _Elephas americanus_, a tooth found at Perinton, about 10 miles east of Rochester and near Irondequoit River. A description of the discovery and of the locality had been given in 1837 (Amer. Jour. Sci., vol. XXXII, p. 377) by an anonymous writer. Two teeth and a tusk had been found in a sandy bank on the stream mentioned while a race was being made for a saw-mill. The tusk, and probably the teeth also, lay at a depth of 4 feet. The exact locality was described as being 2 miles north of the crossing of Erie Canal. This is in reality southeast of Rochester and near Pittsford. On page 59 is described a tusk of a supposed mastodon found at Pittsford in 1830. De Kay regarded the animal as belonging to an undescribed species, but his name _Elephas americanus_ had been applied to the mastodon by Cuvier in 1799. On examining Fairchild’s plates showing the recession of the Wisconsin ice-sheet (Bull. 127, State Mus. New York) it will be seen that the localities where the three specimens of _Elephas primigenius_ have been found are close to the south shore of the ancient Lake Iroquois. The animals could not, therefore, have lived before the ice had nearly or quite withdrawn into the basin of the present Lake Ontario. They may have lived long after this, possibly up to, or near to, the beginning of the Recent. It is to be noted further that the locality of the molar tooth found at Williamson, Wayne County, is closer to the shore of Iroquois Lake than is that of any of the mastodons; so possibly this species existed somewhat longer than did the mastodon. 4. _Buffalo, Erie County._—From the director of the Buffalo Society of Natural History, Dr. William L. Bryant, the writer has received photographs of a right upper hindermost molar of _Elephas primigenius_ dredged from near the middle of Niagara River, opposite Buffalo. The tooth is 275 mm. long and 100 mm. wide on the worn surface. It is worn to near the base in front, but probably no plates are wholly lost. There appear to be about 24 present. It appears probable that the tooth had not been carried far after being washed from its resting-place. Although it probably belongs to the Wisconsin stage, there is a possibility that it was washed out of some older Pleistocene deposit. 5. _Queensbury, Warren County._—Mr. C. A. Hartnagel, assistant State geologist of New York, informed the writer of the discovery, some 60 years ago, of a tooth of an elephant near Queensbury, situated near the southern end of Lake George. The tooth is labeled as found on the John Harris farm. The nature of the deposit in which it was buried is not known. It was found during the excavation of a cellar, therefore at no great depth.