PLATE L. 

 Jurassic ] )inosaurs. — Predentata. 



Stegosaurid.e. 



Page. 



Fig. 1. Dorsal spine of Stegosaurus ungulatw Marsh 192 



Fig. 2. Large caudal spine of same individual 192 



o, side view; b, front view; c, section; d, inferior view of base. 

 Fig. 3. Smaller caudal spine of same 192 



b, posterior view ; other letters as above. 



Fig. 4. Caudal spine of Slegosa urns sulcatus Marsh; side view 193 



Fig. 5. The same spine ; posterior view 193 



Fig. 6. The same; inner view 193 



a, anterior; b, base; p, posterior; r, ridge; 8, face for adjoining spine. 



All the figures are one-twelfth natural size. 



344 



