PLEISTOCENE VERTEBRATES FROM CUMBERLAND CAVE 



27 



Table 6. — Measurements {in millimeters) of mandible and inferior dentition of 



three species of Euarctos 



Measurement 



EvMTctoi cUabilis 



U.S.F. 



M. DO. 



7665 

 (type) 



U.S.N. 



M. no. 



8141 



U.S.N. 



M no. 



8143 



Euarctos 

 amencanus 



U.S.N.M. 

 no. 35388 



Euarctos 

 luteolut 



U.S.N.M. 

 no. 132546 



Mandible 



Length of mandible from anterior end to posterior surface 

 of condyle. 



Depth of jaw below Mi 



Thickness of jaw below Mi.. 



Least width across both rami at constriction posterior to 

 canines 



Inferior dentition 



Distance from anterior margin of canine alveolus to pos- 

 terior surface of Ma 



Length of tooth row, P4 to Mj, inclusive 



Diastema between canine alveolus and P« 



C, anteroposterior diameter at alveolus 



C, transverse diameter at alveolus 



P4, anteroposterior diameter 



Pi, greatest transverse diameter 



Ml, anteroposterior diameter ... 



Ml, transverse diameter of trisonid 



Ml, transverse diameter of talonid - 



Mj, anteroposterior diameter -. 



Mj, greatest transverse diameter 



Ml, anteroposterior diameter 



Mj, greatest transverse diameter , 



117 

 '62 

 136.8 

 1 18.1 

 1 12 

 111 



17.8 

 6.9 

 8.3 

 17.7 

 n.4 

 15.1 

 11.9 



" 197 

 41 

 16 



41 



121 

 67 



33.3 



•20 



12.8 



10.9 



5.7 



20.5 



8.3 



9.4 



20.8 



12.1 



15.1 



12 



1195 

 38 

 14.6 



115 

 66.5 

 31 

 « 19 

 11 

 9.9 

 6.8 

 19.6 

 7.3 

 8.4 

 20.5 

 11.7 

 17.7 

 12.4 



1193 

 36.6 

 16.5 



35 



118.5 

 61 



36.4 

 120 

 11.6 

 9.5 

 5.0 

 18.6 

 7.9 

 9.3 

 19.5 

 11.8 

 13.8 

 11.5 



210 

 40 

 17.3 



37.4 



123.4 



69.2 



32.8 



120.5 



11.9 



9.8 



6.7 



20.5 



8.6 



10.7 



22.6 



14.5 



17.6 



13.8 



1 Approximate. 



ARCTODUS HAPLODON (Cope) 



A crushed right lower jaw, mth the third incisor, canine, and second 

 molar, and an isolated second molar from the left side of the same 

 mandible, U.S.N.M. no. 8005, show the presence of a rather large 

 tremarctine bear in the cave fauna. Several limb bones and parts of 

 fore and hind feet, greatly exceeding in size those of a black bear and 

 apparently belonging to one individual, are also believed to be those of 

 Cope's eastern cave bear. 



The lower jaw from Cumberland Cave has been badly distorted by 

 crushing but appears to be slightly deeper than the jaw figured by 

 Cope (1899, pi. 19, fig. 2) from the Port Kennedy bone deposit. 

 Although the posterior part of the ramus, U.S.N.M. no. 8005, is not 

 preserved, the configuration of the jaw below M2 suggests that the 

 antemasseteric pit probably extended forward nearly to a point below 

 the posterior margin of M2. In Ursus the anterior margin of the 

 masseteric fossa is not so far forward. 



16541—38 3 



