WEALDEN IGUANODONT AN^D OTHER DINOSAURS. 



49 



compression of their centra, which are consequently more wedge- 

 shaped in section. Unfortunately only an anterior dorsal is figured 

 by Mr. Hulke, and in this the neural arch is relatively high ; but 

 since there must be a gradual lowering of the height of the arches 

 from the anterior dorsal to the lumbar region, where (as in other 

 species) the arches are very low, there seems to be no reason why 

 the middle dorsals of the Kimeridge form should not have closely 

 resembled the specimen under consideration. The posterior dorsal 

 or lumbar vertebrae associated with this specimen cannot be dis- 

 tinguished from those of the Kimeridge species described and 

 figured in Mr. Hulke's paper. The length of the centrum of the 

 figured specimen is 0*120, the vertical diameter of its anterior face 

 O'llO, the transverse diameter of the same 0*118, and the total 

 height 0*447. 



Of the associated bones, the left ilium (No. E. 802) is represented 

 in fig. 2 (II.), in association with an ischium to be immediately 

 mentioned. The length of this ilium, which wants the extremity 



Fig. 2. — The left side of the Pelvis of Iguanodon Dawsoni, from 

 the Wadhurst Clay of Hastings. (About -^ nat. size.) 



E. Ilium. Is. Ischium. P. Pubis. a. Obturator process. 



of the preacetabular process, is 0*830, and its greatest depth pos- 

 teriorly 0*260 ; the preacetabular process, when entire, was long, the 

 superior border is convex, and the postacetabular portion is long, 

 Q. J. G. S. No. 173. E 



