64 3 Bulletin American Museum of Natural History. [Vol. XXXIV, 
difference in the tarsus, I should not be disposed to separate it from that 
genus. It may prove to be an ancestral stage of Limnocyon but as the 
evidence stands at present this is doubtful. The single species 1s known 
only from the Clark Fork beds; in the later horizons of the Lower Eocene no 
- 
-~-- 
-_— 
_ 
- 
Wo. /S E887 
A. fT. 
No. /5857 
yaa 
(' 
(Nt \“S v ‘one a4 ‘ a 4 : 
X Ses pO ob aN 
N= ae a ae 
My 
CE 
eo a 
Q pe 
SS \ 
\ \ NY So 
cc ee es 
= 
Fig. 55. 
Fig. 54. Dipsalidictis platypus, upper jaws of type, palatal view, natural size. Clark 
Fork beds. 
9 J f Dp 9 2 
intermediate forms are known to occur while Prolimnocyon is fairly common. 
Which if either of these genera should be regarded as more directly ancestral 
to Limnocyon and Thinocyon, is not clear. 
