PAGU 
28. General type of tooth formation and succession in the Hadrosauridae ; 
inner view of dentary teeth, upper view of same, and section of 
teeth in both jaws 54 
29. Teeth of left dentary of paratype of Edmontosauriis; inner aspect 55 
30. Cervical vertebra of paratype of Edmontosauriis] left lateral and posterior 
views 57 
31. Anterior dorsal vertebra of paratype of Edmontosaurus] left lateral, front, 
and hinder views 59 
32. Posterior dorsal vertebra of paratype of Edmontosaurus] left lateral and 
posterior aspects 60 
33. Right thoracic rib of paratype of Edmontosaurus] anterior view obliquely 
from the front 62 
34. Right humerus of paratype of Edmontosaurus] anterior and posterior 
aspects, and outlines of proximal and distal ends 64 
35. Left ulna and radius of paratype of £^dmon/osawrws; anterior view slightly 
from without 65 
36. Skulls of Hadrosaurinae; Gryposaurus Kritosaurus 70 
37. Skulls of Hadrosaurinae; Edmontosaurus, “Claosaurus” and Diclonius . . 71 
38. Skulls of Saurolophinae; Prosaurolophus and Saurolophus 72 
39. Skulls of Stephanosaurinae; Stephanosaurus, Corythosaurus, and Cheneo- 
saurus 73 
