8 
The teeth of the Northborough specimen, while their roots have 
crumbled away, are very perfect in their crowns ; and five of them 
are of extraordinary beauty, being covered with enamel resembling 
agate or turquois. This enamel, which is sometimes worked for 
jewelry, is known as odontolithe or bone turquois. The coloring 
matter is supposed by some to be oxide of copper, while Dana 
states it to be phosphate of iron. The remaining four teeth re- 
semble cork in color and luster, and are the undeveloped ones 
which are formed in the rear, and are pushed forward as those in 
front wear off and drop out. The accompanying plate, drawn full 
size by Mr. Fred. E. Pollard, well represents the form and condi- 
tion of the perfect teeth. This specimen measured 2^ by 4^ 
inches across the crown, and weighed 19)^ ounces. 
tusks, 10 feet, 1 1 inches, about 234 ft. included in the sockets. The fore-foot 
measures 2 feet across. Weight of the bones, 2002 pounds. \Yhen alive, 
the creature must have been 12 or 13 feet high, and, including the tusks, 25 
feet long. 
The pubhshed statement, that Dr. Warren paid $10,000 for this skeleton, 
is probably incorrect. 
