PETERSON: A REVISION OF THE ENTELODONTIDAS 133 
Tue Hrnp Foor. 
As in other representatives of the Hntelodontidx, the pes, as well as the manus 
of Dinohyus, is didactyl. The total absence of the facet on the cuboid ® for mt. V 
in the type of Dinohyus hollandi is interesting 
and of some importance in connection with 
other modifications of the genus. Professor 
Scott states (87, p. 318) that in Archxotherium 
ingens from the Oligocene of America the fifth 
metatarsal is present. From Kowalevsky’s 
statement and figures it is also very evident 
that Hntelodon magnum of Europe had a fifth 
metatarsal (88, p. 449, Pl. XX VII, fig. 35). 
Unfortunately the cuboid and mt. IV of the 
type of Bodcherus hwmerosus from the John 
Day formation, are badly preserved in the 
region where the facet for mt. V would be 
found, so that its presence or absence is only a 
matter of speculation. Through the courtesy 
of Professors Schuchert and Lull the writer 
had the opportunity of studying the material 
representing Entelodonts which was collected 
for Professor Marsh from the John Day region 
as long ago as 1875. In this collection is a 
portion of a skeleton of an Entelodont from 
the green sandstone (probably the middle beds) 
which is somewhat smaller than Bodchwrus 
described by Cope. The general features of 
the remains seem to indicate a more primitive 
type having a closer resemblance to Archixo- 
theriwm ingens from the Oligocene than the 
new genus Dinohyus. On the cuboid of this 
specimen from the John Day formation the 
facet for mt. V is plainly indicated. Fig. 78. Dorsal and Palmar Views of Left Pes 
Astragalus. fia correspondence with the of Type of D. hollandi Peterson. ps, palmar sesa- 
te ee 
oblique trochlea of the tibia the proximal gene Belt aa 
55 A euboid (No. 1926) referred to this genus, which was found in quarry No. 2 (Agate Spring Fossil Quarries), 
is somewhat heavier than that in the type. The two specimens, which represent two individuals, are almost identical 
in their general characters, except that in No. 1926 there is present a minute articular surface for mt. V, which would 
seem to indicate individual or specific differences. 
