PLATE III. 



Enchoctus petrosus Cope. 



Figure 1. — Two palatines; upper figure is left bone. This belongs to 

 specimen No. 804 (pi. II). eth, part of ethmoid in position; pf, anterior 

 end of pterygoid in position, x %. No. 80. 



Fig. 2. — Pair palatines arranged as in figure 1. X %. No. 803. 



Fig. 3. — Separate palatine tooth with a cross section of the same at the 

 middle point just above it. The tooth shows the extent of the grooves on 

 the posterior mesial side. X %. No. 833. 



Fig. 4. — Pair of palatines without fangs, arranged as in figure 1. 

 X Vs. No. 801. 



Fig. 5. — Two odd palatines arranged as in figure 1. The upper figure 

 may not be E. petrosus. (cf. pi. VII, fig. 17.) X %■ No. 16. 



Fig. 6.— Premaxillary. X Vs. No. 803. 



Fig. 7. — Symphysial portion of left dentary. x %. No. 803. 



Fig. 8. — Mandible, showing mesial aspect, art, articular; ang, angu- 

 lar; den. dentary. x Vs. No. 839. 



Fig. 9. — Elements of the mandibles. The quadrate (qu) is raised out 

 of its position in order to show it more clearly, art, articular; anf/, 

 angular; de?), dentary; pa7, palatine; pt, pterygoid. X Vs. No. 803. 



Figs. 10 and 11. — The largest and smallest of a graduated series of 

 palatines which can not be positively identified, as the fangs are broken 

 off. They are probably E. petrosus. x Vs. Nos. 21 and 25. 



