154 BULLETIN 110, UNITED STATES NATIONAL MUSEUM. 



Plate 32. 



Caudal vertebrae of Dryptosaurus and Antrodemus. 



Fig. 1. Anterior caudal vertebra of Dryptosaurus? potens (Lull). Type No. 3049, U.S.N.M. Viewed 



from the left side. About two-thirds nat. size. (See p. 117.) 



2. Anterior caudal vertebra of Antrodemus valens Leidy, No. 8367, U.S.N.M. Viewed from the 



left side. About two-thirds nat. size. Comparative views to show difference in outline, 



especially of the ventral borders. (See p. 117.) 



Plate 33. , 

 Lower jaw of Labrosaurus. 



Left dentary of Labrosaurus ferox Marsh. No. 2315, U.S.N.M. Type. One-half nat. size. 

 (After Marsh.) ' 1, lateral view; 2, internal view; 3, superior view. (See p. 124.) 



Plate 34. 



Bones of Dryptosaurus and Coelurus. 

 Fig. 1. Tooth of Dryptosaurus ? medius (Marsh). No. 3121, Goucher College. Side and front views, 

 nat. size. (After Lull.) (See p. 120.) 



2. Tooth of Dryptosaurus t medius (Marsh). Type No. 4972, UjS.N.M. Twice nat. size. 



(See p. 120.) 



3. Proximal phalanx of hind foot of Dryptosaurus? medius (Marsh). Superior view, three-eighths 



nat. size. (After Lull.) (See p. 121.) 



4. Tooth of Coelurus ? gracilis Marsh. No. 4973, U. S. N. M. Side view. Nat. size. (After Lull.) 



(See. p. 126.) 

 Figs. 5 and 6. Pubes of Coelurus agilis Marsh. Yale University Museum. 5, side view; 6, front view. 

 One-fourth nat. size, a, proximal end; b, articular ends of pubes; c, distal ends. 

 (After Marsh.) (See p. 128. ) 



7 and 8. Dorsal vertebra of Coelurus fragilis Marsh. Type No. 1991, Yale Museum, nat. size. 

 7, front view; 8, side view, a, anterior end; d, diapophysis; nc, neural canal; p, pos- 

 terior end; s, base of neural spine; z, anterior zygapophysis; z', posterior zygapo- 

 physis. (After Marsh.) (See p. 127.) 



Plate 35. 

 Skeletons of Ornithomimus. 



Fig. 1. Articulated sacrum, caudal vertebrae and pelvis of Ornithomimus sedens Marsh. Type No. 



4736, U.S.N.M. Viewed from right side. About one-sixth nat. size. (See p. 133.) 



2. Skeleton of Ornithomimus alius Lambe. No. 5339, Amer. Museum of Natural History. Shown 



in the attitude as found and as now exhibited. About one-fifth nat. size. (After Osborn.) 



(Seep. 130.) 



Plate 36. 



Bones of Coelurus and brain of Ceratosaurus. 



Figs. 1-2. Cast of brain cavity of Ceratosaurus nasicornis Marsh. Made from skull shown in plate 17. 

 (1) Viewed from top; (2) Viewed from left side, cer., cerebral hemispheres; med., medulla 

 oblongata; olf., olfactory lobe; I, II, III, V, cranial nerves one, two, three and five. Both 

 figures one-half nat. size. (After Marsh.) (See p. 93.) 



3. Ungual phalanx of an unidentified dinosaur from the Belly River formation (Upper Cretaceous), 



No. 5387, Amer. Mus. Nat. Hist. Lateral view. Twice nat. size. (See p. 127.) 



4. Ungual phalanx of Coelurus? gracilis Marsh. Type. No. 4973, U. S. N. M. Lateral view. 



Twice nat. size. With the exception of size note the close resemblance of this bone to 

 fig. 3. (See p. 127.) 



