PRELIMINARY LIST OF THE MAMMALS OF NEW YORK 375 
Marsh (’92) describes a skeleton in the museum of Yale university which 
is “perhaps in the best preservation of any skeleton of the American 
mastodon yet discovered.” I am informed, however, that it lacks the hind 
legs. Dana (’95, p. 99g) states that this skeleton was found at Otisville, 
Orange co. 
The Newburgh mastodon. ‘“ The mastodon discovered about two 
months ago at Newburgh, N. Y., has now been more fully uncovered, but 
thus far proves to be an incomplete skeleton. ‘The parts preserved are 
the skull, much injured by removal, both upper tusks, the vertebrae be- 
ginning at the last cervical and extending to near the tip of the tail, 
18 ribs on each side out of 20, a right scapula and a complete pelvis and 
portions of the foot bones. No traces of the hmbs have been found thus 
far, although extensive excavations have been made. Fortunately, 
Mr Schaefer, the owner, has removed the bones with care and treated 
them skilfully. Many very interesting observations could be made by a 
careful study and exploration of this locality. During a visit by the 
present writer, the following observations were made, partly with the aid 
of Mr Schaefer. The deposition is in three levels, the two upper being 
separated by a smooth clearly defined surface, and by slight differences 
in the character of the soil, which is largely dark and thoroughly decom- 
posed vegetable matter, intermingled with few stones and very numer- 
ous remains of trees of various sizes. Examination of the latter gives 
abundant evidence of the existence of beaver in this hollow in the period 
of the mastodon, and we can easily imagine that the different soil levels 
were due to the building of successive beaver dams. When the dams 
were first completed the back flow of the water caused temporarily an 
interruption of the deposition of vegetation and may account for the 
differences of level above alluded to. ‘The locality has been visited by 
a large number of people, including several well known paleontologists.” 
—H. F. Osborn. 
Castoroides ohioensis Foster 
1838 Castoroides ohioensis Foster, Second annual report on the geolog- 
ical survey of Ohio. 1838. p. 81. 
1847 Castoroides ohioensis Hall, Boston journ. nat. hist. 5: 385. 
Type locahty. “ About one-half of a mile west of Nashport [Ohio]” 
(Foster, ’38, p. 80). 
Distribution in New York. Remains of Castoroides ohioensis have 
been found only once in New York —in a swamp near Clyde, Wayne co. 
Principal records. Wall: ‘‘The cranium was received from Rev. 
Benjamin Hall, D.D., president of Geneva college, and was discovered 
