oscooD] 
Eye: 1. 
Fic. 2. 
Teer: 
Gs, 
Bret: 
G2, 
Bre, 3. 
TG re 
tei: 
lFacey ae 
igitey sep 
vig) Te 
IG: 2) 
SCAPHOCEROS TYRRELLI 185 
EXPLANATION OF PLATES 
(About one-fifth natural size) 
Pirate XXXVII 
Upper surface of skull of Ovibos moschatus. Adult male, No. 14413, 
U. S. National Museum. 
Upper surface of skull of Scaphoceros tyrreli. Type, No. 2555, U. 
S. National Museum. : 
PLATE XXXVIII 
Under surface of skull of Ovibos moschatus. Adult male, No. 14413, 
U. S. National Museum. 
Under surface of skull of Scaphoccros tyrrell. Type, No. 2555, U. 
S. National Museum. 
PEATE DOXOXIX 
End view of skull of Scaphoceros tyrrelli. Type, No. 2555, U. S. 
National Museum. 
End view of skull of Boétherium bombifrons. Type, from collection 
of Academy of Natural Sciences, Philadelphia. 
End view of skull of Ovibos moschatus. Adult male, No. 14413, U. 
S. National Museum. 
PLaTE XL 
End view of skull of Scaphoceros cavifrons. Type, from collection 
of Academy of Natural Sciences, Philadelphia. 
Side view of skull of Scaphoceros tyrrelli. Type, No. 2555, U. S. 
National Museum. 
PLATE XLI 
Upper surface of skull of Scaphoceros cavifrons. Type, from col- 
lection of Academy of Natural Sciences of Philadelphia. 
Upper surface of skull of Bodtherium bombifrons. Type, from col- 
lection of Academy of Natural Sciences of Philadelphia. 
XLII 
Under surface of skull of Scaphoceros tyrrelli.. Type, from collec- 
tion of Academy of Natural Sciences of Philadelphia. 
Under surface of skull of Bodtherium bombifrons. Type, from col- 
lection of Academy of Natural Sciences of Philadelphia. 
