Proceedings Am. Philosoph. Soc. LVIII 



Plate I 



Three studies of head of Camarasaurus. A, head extended and bent up- 

 wards. B, neck flexed and head bent downwards. C , neck flexed and head bent 

 strongly downwards to show ground-feeding pose and to expose the teeth. 

 The head of Camarasaurus is extremely short and deep. The nostrils and 

 eyes are elevated. The tympanum leaves a space behind the quadrates. 



