1893.] The Ancylopoda, Chalicotherium and Artionyz. 131 
Ancylopoda Perissodactyla 
Meniscotheriide : Phenacodontidæ 
i Condylarthra 
Protungulata 
(unguiculate) 
The purpose of this paper is not; however, to express a final 
opinion but to suggest inquiry. While agreeing with Cope 
that the Ancylopoda represent a distinct division of the mam- 
malia, we must admit that the broad zoological relations of 
this division are yet to be determined. 
c. External. 
a. Internal. 
Fig. 4. Right hind foot of Artionyx gaudryi. 
POSTSCRIPT. — THE DISCOVERY OF ARTIONYX. 
The hind foot of Artionyz gaudryi was found last summer 
by the American Museum party, under Dr. Wortman, in the 
White River Miocene of South Dakota. ; 
The discovery of this foot was one of those complete surprises 
which render paleontological research so fascinating. As indi- 
-cated in the above article, we were daily expecting to find 
remains of Chalicotherium in the lower Miocene of America, 
but no one could have anticipated finding a type related, and 
yet so entirely different. 
