70 
elements in advance of the orbit, with the exception of the maxillary, 
have also been restored, providing a rather remarkable nasal and pre- 
maxillary contour. The maxillary appears to be preserved to near its 
lower anterior extremity. 
Figure 36. Skulls of Hadrosaurinse. A, Gryposaurus, Lambe; B, Kritosaurus, Brown. ^ 
natural size. 
Edmontosaurus, “ Claosaurus ” annectens, and Diclonius, Figures 
37C, D, and E, respectively, the remaining members of the HadrosaurincBy 
illustrate well the general tendency in the crestless forms to a lowering 
of the skull as time progressed. 
