of death. As the bones of various animals are completely mingled in 

 the pit, this case might appear to be one of accident but for the 

 fact that the jaws were so tightly locked and the teeth badly broken 

 at place of contact, it seemed that nothing but a sharp conflict between 

 the two tigers could have caused such a condition. 



Many teeth are found much worn down, some broken, in fact, 

 imperfect teeth, are the rule rather than the exception. Injuries 

 came to the animals in those days, as well as now. This is shown 

 by the great scar in one excavated tiger skull. This scar is about 

 four inches long and must have been made when the tiger was com- 

 paratively young. Since the wound caused an arrested development 

 of that side of the head, as is seen by the very much smaller canine 

 on that side. These imperfections are further noted in the failure 

 of development of the molar teeth in the lower jaw of an other- 

 wise fine wolf skull, in which the molar teeth are wanting. 



Disease also and malformation occur, as in the case of Exostosis 

 in the metacarpal of the lion. Figure 7, in which not only was the 



Figure 7. 

 Exostosis of Lion, Saber-tooth Tiger, Giant Wolf. 



bone diseased but also a decided enlargement occurred in the body's 

 effort to shut up, or heal the wound. The fusing of the bones of the 

 lion's foot and an enlargement of pelvis occurred. 



There are several causes for the extinction of animals, among 

 which the most common are the lack of adjustment to environment 



32 



