260 SUPPLEMENT. 



(g) ; and three imperfect caudal vertebrae. The ilium, 

 which exhibits the acetabulum, the portion immediately- 

 above the same, and the preacetabular notch, agrees pre- 

 cisely with that of the type, and affords the grounds of 

 the specific reference. The femur has lost the distal ex- 

 tremity, and the portion of the shaft on which the inner 

 trochanter is situated is very imperfect. The length from 

 the interval between the greater trochanter and the upper 

 extremity of the intercondylar fissure is 0,834 (29 inches), 

 and the total approximate length about 0,937 (37 inches). 

 The head is placed nearly at right angles to the shaft, and 

 there is but a slight convexity of the anterior border of 

 the latter, in both of which respects this bone resembles 

 the femur of J. mantelli. 



These specimens are noticed by the writer in the ' Quart. 

 Journ. Geol. Soc.' vol. xlvi. p. 38. 



Dawson Collection. Purchased, 1889. 



R. 1734. Cast of an almost entire late cervical vertebra, not im- 

 probably belonging to this species. The original was 

 found in a nodule of hardened "Wealden Clay on the 

 beach at Hastings, and is in the possession of P. Eufford, 

 Esq., of Hastings. It is described and figured by the 

 writer in the 'Quart. Journ. Geol. Soc' vol. xlvi. p. 44, 

 fig. 3. With the exception of some damage to the rim 

 of the posterior cup of the centrum, the specimen is 

 perfect. The total height is 0,330 (13 inches), the height 

 from the basa of the neural canal to the summit of the spine 

 0,177 (7 inches), and the transverse diameter of the 

 posterior cup of the centrum 0,164 (6-5 inches). 



Made in the Museum , 1889. 



Iguanodon fittoni, Lydekker \ 



Apparently of somewhat smaller dimensions than I. daivsoni. 

 Ilium very deep, with its superior border convex and not reflected 

 and the external surface very concave ; the preacetabular process 

 very deep, and probably comparatively short, without horizontal in- 

 ward extension at its origin, and no outward inclination of the in- 

 ferior border ; postacetabular portion deep and pointed terminally, 

 with the inferior moiety much inflected so as to form a wide shelf 

 placed nearly at right angles to the lateral surface ; preacetabular 



1 Geol. Mag. dec. iii. vol. vi. p. 354 (1889). 



