The Loup Fork Beds 125 



world, that these jaws of the largest mammal ever 

 found in Kansas will find their last resting-place in 

 the great British Museum, where many of my finest 

 discoveries have gone. 



Another splendid set of lower jaws I found in 

 1905 in the Sternberg Quarry, of which I shall 

 speak later, for the Royal Museum of Munich, Ba- 

 varia. Part of the symphysis was broken off, as 

 were also the inferior tusks. The length of the 

 jaw as preserved is two feet, six inches and a half, 

 and the height of the condyle, fourteen inches. In 

 the center of the grinding surface, the height is nine 

 and a half inches. The length of the molar is about 

 seven and a half inches, and the width three and a 

 half. This is Professor Cope's Trilophodon. 



We found near this mastodon many chisel-like 

 tusks that had fallen out of their respective jaws and 

 lay scattered with the other bones. By comparing 

 this specimen with the new species, it will be noticed 

 that there is quite a difference in size, though evi- 

 dently they were about the same age, as in both 

 cases all the teeth have been discarded except the 

 last molars. 



The teeth of these animals were kept sharp by the 

 sand that adhered to the roots on which they lived. 

 Falling into the pits and valleys between the crests 

 of enamel, it scoured away the dentine and cemen- 

 tum, and kept the great grinders ever sharp and 



