238 Cincinnati Society of Natural History. 
This seems to show the food of this owl to be almost exclusively 
mice and rats, and proves it to be a species of the greatest economic 
value. Since my visit to Glendale, Mr. R. T. Shepherd informs me 
that two of this species were taken near Monroe, Ohio. This makes a 
total of thirteen individuals on record, and removes it from the ranks 
of the rare or accidental species of the locality. 
THE GIANT BEAVER (Castoroides ohioensis), Foster. 
ANOTHER IncIsor TootuH Founp 1n OHIO. 
By F. W. Lanepon, M.D. 
During a recent visit to Richmond, Indiana, I had the pleasure of 
inspecting a lower incisor tooth of the above mentioned animal, which 
merits notice as adding another specimen to the somewhat meagre 
list of fragments from which the species has heretofore been known 
to zoologists. 
The specimen forms one of the attractions in the cabinet of Dr. J. 
W. Jay, of Richmond, Ind., who very kindly allowed it to be brought 
to Cincinnati for exhibition to the members of this society, and others 
interested in the subject. The doctor informs me that it was ex- 
humed near Greenville, Darke county, Ohio, at a depth of four feet, 
in a Swampy locality. 
Its measurements are as follows: Greatest length along anterior 
curvature, 114 inches. Distance (straight line) from proximal to 
distal extremity, 84 inches. : 
In section it is triangular in shape, the outer surface curved. The 
dimensions of this triangular Section, at about the centre of the tooth, 
are as follows: External (curved) border, 12 inch; internal border, 
2 inch; superior border, 1 inch. | 
The enamel on the external surface is black in color, and presents 
sixteen longitudinal ridges, each about 1 mm. in width, running the 
entire length of the tuoth, and separated by grooves varying from 1 to 
3 mm. in width ; these grooves increasing in size from within outward 
somewhat regularly. The distal extremity presents a beveled surface 
superiorly, irregularly triangular in shape; the base of the triangle 
being formed by an abrupt shoulder, situated one inch behind or below 
the very obtusely pointed distal extremity. A fragment ofthe enamel, 
