44 MEMOIRS OF THE CARNEGIE MUSEUM 
large ; posterior portion of the crown of P* porportionally heavier than in Archexo- 
theriwm; the crown of P+ with antero-internal angle of comparatively greater 
development, which gives the outline of the tooth amore nearly square appearance 
co, 
My 
LENNY OR 
x li 53 
Fia. 1. Type Specimen of Entelodon magnum Aymard. 4} nat. size. (1) Crown View of Upper Dentition. (2) 
Crown View of Lower Dentition. (3) External View of Lower Dentition. (Drawn by Sidney Prentice from Casts of 
the Original, compared with the Figures given by Kowalevsky. ) 
than in the American form; para- and metaconids completely united showing 
no evidence of separations as in young and unworn teeth of Archxotheriwm. 
The general appearance of the dentition of Hntelodon magnum seems to point toward 
a more specialized type, which either represents a later or a more advanced form, 
so far as the dentition is concerned, than Archxotheriwm from the lower Oligocene 
of America. Occipital condyle of proportionally great vertical diameter; supra- 
occipital greatly expanded superiorly and much contracted immediately above the 
condyles’; paroccipital process far in advance of the condyles, relatively compressed 
antero-posteriorly, and expanded transversely ; no evidence of the external auditory 
meatus immediately in front of the paroccipital process as in Archxotheriwm. 
If Kowalevsky’s observations® regarding the union of the foramen ovale and 
lacerum medius, as in the recent Swidz, is correct, this is of considerable importance, 
5 Professor Scott (87, p. 284) seems inclined to doubt Kowalevsky’s statement that ‘‘ foramen ovale . . . 
mit dem foramen lacerum medium versmolzen war, wie bei den heutigen Suidee und bei Hippopotamus.’’ 
