105 
(fig. 13, diagr. 14) the heel of pt is likewise bicuspid, and this is 
one of the reasons for the assertion of Lydekker and Lan- 
kaster ("On the Affinities of Æluropus melan.”, Trans. Linn. Soc. 
1901) that it is more nearly related to 
Ælurus than to Ursus. From a cur- 
sory glance at pt of Æluropus it 
seems also very much like that o 
ie 0 NRA NES Ælurus, but a more careful examina- 
pø isolated, from the inner and tion shows an important difference. 
me eee tin strong I am very much indebted to Mr. Old- 
na se ned field Thomas for allowing me during 
a visit to the British Museum to detach 
pt of Ælurus and Æluropus in order to compare them. In the 
normal condition cusp 6 is supported by a special root which is 
expanded to support the anterior part of cusp 7 as well, when 
this is present, whereas ! 
its posterior part rests 
on å part of the root 
of 3 or 5; this condi- 
tion is seen in all bu- 
nodont mammals. The 
Same is the case with 
£Élurus (fig. 12), and 
here the root under 6 
and ? is very strong; 
but Æluropus (fig. 13) 
shows the strange con- 
dition of the heel-root 
Supporting, not the an- 
terior heel-cusp which Å;: 
is supported by the an- Fig. 13. Æluropus melanoleucus. 
rn erseiledtse BEER bre 2 
— Bo: part of sly "nige dik re må strong Frigd dend 
eel-cusp, i? sag NÅ 73). Ur 
