HOLLAND AND PETERSON: OSTEOLOGY OF THE CHALICOTHEROIDEA. 387 
the size of the smallest phalanges of Ancylotherium Pentelici. The latter was a gigantic 
animal probably greatly exceeding in size the largest rhinoceros, while the foot of the 
Edentate from the phosphorites hardly equaled in size that of a pig. Judging by the 
form of the upper surface of the ungual phalanx the articulation of this phalanx with 
the second was not as solid as in the case of Ancylotherium Pentelict and Macrotherium; 
it permitted a measure of lateral movement, while in the other species only backward 
and forward movement was allowed. The posterior surface of the ungual phalanx of 
Ancylotherium priscum was less curved above than in Ancylotherium Pentelici, and 
much less than in Macrothervwm. We may hence conclude that the digit was very 
hooked in the Macrotheriwm, a little less hooked in Ancylotherium Pentelici, and still 
less hooked in Ancylotherium priscum. Thus we are led to conclude that the older 
form was less specialized and not so greatly separated from that of other Ungulates. 
The fragments of Ancylotherium priscum collected at Mouillac, canton of Caylus 
(Tarn-et-Garonne) by Mons. Rossignol, have been presented to the Museum. M. 
Rossignol has also sent me fragments excavated in the same place, which are referable 
to the following species: lurogale intermedia, Cynodictis compressidens, a smaller 
Cynodictis, Canis paleolycos, Hyenodon leptorhynchus, a carnivore, related to Pseude- 
lurus Edwardsi, Amphictis ambigua, Lophiomeryx, Dichobune, Cainotherium, Gelocus. 
There is therefore reason to believe that the Edentate of the phosphorites lived, it may 
be, in the epoch of the Lower Miocene (horizon of the Fontainebleau sands), it may be 
in the last phase of the Eocene (horizon of the Brie limestone). 
In the neighborhood of Cantayrac, which, like Mouillac, belongs to the canton of 
Caylus, M. Rossignol has discovered another ungual phalanx, the fissure of which 
recalls Ancylotherium, but this phalanx is much smaller yet than that of Ancylothervum 
priscum. It is also more compressed latterly. Its length is 11 mm., its breadth in 
the middle only 5 mm. It is bulged on its lower surface, showing that it rested flat 
upon the ground. Its upper surface, intended to be connected with the second phalanx, 
is surrounded by a rim or flange which does not exist in Ancylotherium. Besides it is 
almost flat and straight. This shows that the digit to which it belonged was not hooked. 
It is possible that this fragment did not belong to an Edentate.” (Trans. W. J. H.) 
Gaupry, A.— Sur quelques Piéces de Mammiféres Fossiles qui ont été trowvés dans les Phos- 
phorites du Quercy.” Journal de Zodlogie, Vol. IV, pp. 518-527. 
The article is an elaboration of the two communications made to the Academy 
of Sciences and published in the Comptes Rendus, Vol. LX XXI, at p. 1036 and p. 1113. 
It is accompanied by Plate XVIII, in which figs. 3-8 represent the type of Chalico- 
thervum priscum, and figs. 13-14 represent the type of Chalicotheriwm modicum. 
1876. 
Gervais, Paut—Journa Ide Zodlogie, Vol. V, pp. 424-432, Pl. XVIII. 
The genus Pernatherium (type P. rugosum) from the Eocene of Paris is established. 
It differs from Macrothervum and Ancylotherium in the form of the os caleaneum. 
