728 General Notes. 
CHALICOTHERIUM AND MacrorHertum.—M. Henri Filhol 
has recently made a discovery of remarkable interest in the beds of 
Sansan, of the middle Miocene of France. It removes, in the first 
this is a well-marked perissodactylic type, closely resembling that 
of Palsosyops, in the tarsus, especially. er an examination of 
the feet in the collection of the Jardin des Plantes, no doubt re- 
mained in my mind of the association of Chalicotherium and 
Macrotherium. Without anticipating M. Filhol’s' memoir I may 
note a few of the Perissodactyle characters of the tarsus. The 
calcaneum has a long neck and broad internal extension, which 1s 
lacking in the edentates, for articulation with the astragalus. 
The latter bone is much like that of some species of Aphelops with 
the neck very short; it has a broad facet for the cuboid. The 
cuboid has a postero-internal extension which is also found in 
Paleosyops. The cuneiform is very highly modified, being re- 
duced anteriorly toathin shell. The third metatarsal abuts against 
the cuboid, the second against the external cuneiform. In short, 
remove the phalanges, widen the navicular, and lengthen the nie 
instead of the second metatarsal and you have a true Perissodacty/¢ 
tarsus. The carpus is equally so, but is much less characteristic. 
Turning to the skull, we find of course the teeth of the Palæosyops 
type. I think there is an alisphenoid canal. There are other non- 
perissodactyle characters; there is no third trochanter of the fem- 
urand, as M. Filhol points out the arrangement of the skull 1s 
very different. The tympanic bones are also largely develope a 
of a unique shape. The question remains, what is this amıma 
