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THE POPULAR SCIENCE MONTHLY. 



trils are spacious, and chambered in their anterior region ; the orbits 

 are of moderate size and elongated along the vertical. The temporal 

 fossa is limited above and below by a bony arch, a disposition which 

 is otherwise found among living lizards only in the Hatteria. The 



Fig. 4.— Iguanodon Bkrnissartensis.— (At the Brassels Royal Museum of Natural History. Ee- 

 stored and mounted by M. L. F. Depauw.) 



Head : a, left nostril ; 6. left orbit ; c, left temporal fossa. Vertebral column : d, cervical region ; 

 «, dorso-lumbar region ; /, sacral region ; gr, caudal region ; A, left scapula ; i, left coracoid ; 

 Ic. left humerus ; l^ left ulna ; tm, left radius ; n, sternum ; o, left ilium ; p, left pubis ; g, left 

 post-pubis ; r, left ischium ; «, left femur ; *, left tibia ; v.. left fibula ; v^ tliird trochanter. I, IT, 

 ni, IV, V, digits; X, diagrammatic transverse section of the body between the fore and hind 

 limbs. 



