126 R. 8. Lull — Cretaceous Armored Dinosaur, 



Marsh, O. C. 1889. Notice of gigantic horned Dinosauria from the Creta- 

 ceous. This Journal (3), 38, 173-175, 1 fig. 

 ■ — 1895. On the afSiiities and classification of the dinosaurian reptiles. 



Ibid. (3), 50, 483-498. 

 Moodie, E. L. 1911. An armored dinosaur [Stegopelta] from the Upper 



Cretaceous of Wyoming. Kansas Univ. §ci. Bull., vol. 5, 251-21Z, pis. 



55-59, 1 text fig. 

 Nopcsa, F. 1905. British dinosaurs: Pol acanthus, Geol. Mag., dec. 5, vol. 



2, 241-250, figs. 1-8. 

 Seelej, H. G. 1892. On the os pubis of Polacanthus foxii. Quart. Jour. 



Geol. Soc, London, 48, 81-85, fig. 1. 

 Wiedersheim, E. 1907. Comparative anatomy, 3d ed. 

 Wieland, G. E. 1909. A new armored saurian [Hierosaurus sternhergi] 



from the Niobrara. This Journal (4), 27, 250-252, figs. l-7a. 

 — 1911. Notes on the armored Dinosauria. Ibid. (4), 31, 112-124, figs. 



1-6. 

 — 1912. Note on the dinosaur-turtle analogy, Science, n. s., 36, 287-288. 



DESCEIPTION OF PLATES I TO IV. 



PI. I. — Nodosaurus textilis. Holotype. Cat. No. 1815, Y. P. M. Fig. 1, 

 dorsal vertebrae and armor, superior aspect. Fig. 2, oblique lateral aspect 

 of the same. Both x about 2/9. Fig. 3, complex of ribs and dorsal armor, 

 Neuperior aspect; proximal end to the right; X about 1/6. Fig. 4, keeled 

 ^ armor plate, external aspect ; X about 2/9. Fig. 5, ca. caudal 4, right as- 

 pect; X about 2/9. 



a, armor; h, actual bone of centrum; c, centrum; cp, costal armor 

 plates; icp, intercostal plate; m, matrix impression of centrum; up, neural 

 plate; pr, prezygapophysis ; r, rib; s, spinous process summit; sd, sub- 

 dermal scutes; t, transverse process; ten, tendon; X and dotted line, 

 restoration. 



PI. II. — Pelvis of Nodosaurus textilis. Holotype. Cat. No. 1815, Y. P. M. 

 Dorsal aspect, showing overlying sacral armor. X l/^- d, diapophysial 

 lamina; np, neural armor plate; r, rib impression; s, summit of spinous 

 process. 



PI. III. — Pelvis of Nodosaurus textilis. Holotype. Cat. No. 1815, Y. P. 

 M. Ventral aspect. X 1/8- a, acetabulum; -i, ischiatic peduncle; p, pubic 

 peduncle; r, rib impression; sr, sacral rib. 



PI. IV. — Nodosaurus textilis. Holotype. Cat. No. 1815, Y. P. M. X 

 about 1/6. Fig. 1, posterior caudal (31), right aspect. Fig. 2, right ulna, 

 oblique inner view. Fig. 3, right radius. Fig, 4, left femur, anterior aspect. 

 Fig. 5, left tibia and proximal portion of fibula. 



