198 DINOSAUEIA. 



No. R. 798. This specimen closely resembles the lumbar 

 vertebra of I. prestwichi, figured by Hulke in the ' Quart. 

 Journ. Geol. Soc' vol xxxvi. pi. xix. figs. 6-8. 



R. 803, 804, 805. Three trunk vertebrae, associated with the pre- 

 ceding. 



R. 806. The proximal portion of a chevron-bone of the same 

 individual. 



R. 798 b. A numerous series of trunk and caudal vertebrae, associated 

 with the preceding. In one of the larger caudals the 

 length of the centrum is 0,138, and the vertical diameter 

 of its anterior face 0,143. 



R. 604. A series of more or less imperfect trunk and caudal ver- 

 tebrae, apparently belonging to the same individual as the 

 ischia No. R. 811, and, if so, referable to this species. 

 One of the anterior dorsals (No. 1) has the arch as high as 

 in the corresponding vertebra of I. mantelli, No. 2137, but 

 the centrum is relatively longer and more decidedly wedge- 

 shaped in section. In a middle dorsal (No. 2) the rib- 

 facet rises to near the summit of the platform. In an 

 anterior caudal (No. 3), which may be the second or third 

 in the series, the length of the centrum is 0,087, the 

 vertical diameter of its anterior face 0,135, and the trans- 

 verse 0,160 ; there is a small chevron-facet on the posterior 

 face. In a more posterior, but still early, caudal vertebra 

 (No. 4) the length of the neural spine is rather more than 

 three times the vertical diameter of the centrum, in which 

 the chevron-facets are large and encroach to a great extent 

 upon the haemal surface. 



R. 604 a. A series of imperfect ribs, apparently associated with 

 No. R. 604. 



R. 802. The left ilium, wanting the extremity of the preacetabular 

 (Fig.) process, and the associated acetabular portion of the pubis 

 of the same side ; associated with the vertebra No. R. 798. 

 These specimens are two of the types, and are figured by 

 the writer, op. cit. p. 49, fig. 2, in conjunction with the 

 ischium No. R. 811, the pubis being restored from that 

 of Camptosaurvs ; this figure is reproduced in fig. 39. The 

 length of the ilium to the point of fracture is 0,830, and 

 its greatest depth posteriorly 0,260 ; the pubis differs 



