266 SUPPLEMENT. 



Iguanodon mantelli (supra, i. p. 218). 

 The ilium No. E,. 113 (i. p. 222) is figured by the writer in the 

 ' Quart. Journ. Geol. Soc' vol. xlvi. p. 37, fig. 1 D. 



The calcanea Nos. R. 131 & 28671 (i. p. 225) belong to Sauropoda. 



The following specimens are not specifically determined. 

 R. 1659. The terminal phalangeal of the middle digit of the pes of 

 a large form ; from the "Wealden of the Isle of Wight. 



Presented by the Dorsetshire Museum, 1889. 



[Cetiosaurus brachyurus, Owen \] 



2109. The centrum and base of the neural arch of a vertebra appa- 

 rently referable to the anterior part of the caudal region 

 of a comparatively small Iguanodon (? i". mantelli) ; from 

 the Wealden of Sussex. One of the types of C. brachy- 

 urus ; noticed by Owen in the ' Rep. Brit. Assoc.' for 1841 , 

 p. 100. Mantell Collection. Purchased, 1838. 



Generically Undetermined Specimen. 



46770. An imperfect sacral vertebra ; from the Wealden of the 

 Isle of Wight. This specimen, which retains a portion of 

 the rib of the left side, agrees precisely with the second 

 sacral of the undetermined specimen No. R. 144 (Pt. I., 

 p. 246). The sacrals, Nos. 46773 and 2127 (Pt. I. p. 230), 

 are likewise of the same type. These vertebrae are much less 

 compressed than those of the sacrum referred to I. mantelli, 

 and in their flattened haemal surface approximate to I. 

 hollingtoniensis, although the centra are lower and nar- 

 rower. If the above-mentioned sacrum be rightly referred 

 to /. mantelli, the present type of sacrum may belong to 

 Sphenospondylus. Purchased, 1875. 



Order ICHTHYOPTERYGIA (supra, ii. p. 1). 

 Family ICHTHYOSAURIM1 (suprh, ii. p. 6). 



Genus OPHTHALMOSAURUS (supra, ii. p. 81). 



The specimens in the collection of A. N. Leeds, Esq., show that 

 in the type species at least the teeth were very small and few in 

 number, and that the femur was about one half the size of the 

 humerus. 



1 Rep. Brit. Assoc, for 1841, p. 100 (1842). 



