136 DINOSAUEIA. 



by the writer in the ' Quart. Journ. Geol. Soc' vol. xliii. 

 pp. 156-158 (where it was suggested that it might belong 

 to Ornithopsis) ; the figure being reproduced in the accom- 

 pany ing woodcut. Fox Collection. Purchased, 1882. 



R. 146 a. The anterior half of the centrum of a caudal vertebra of 

 similar general type ; from Brook. Noticed by the writer 

 op. cit. p. 158. Same history. 



Titanosaurus, sp. b. 



Apparently larger than either of the preceding. 

 Hob. Europe (England). 



32390. A slightly imperfect postmedian caudal vertebra ; from the 

 Upper Greensand of the Isle of Wight. Noticed by the 

 writer in the ' Quart. Journ. Geol. Soc' vol. xliv. p. 54. 

 The length of the centrum is 0,175, the vertical diameter 

 of its anterior cup 0,140, and the transverse 0,120. 



Purchased. About 1857- 



Genus DINODOCUS, Owen 1 . 

 Very imperfectly known. Erom its geological horizon, as sug- 

 gested by the writer in the ' Quart. Journ. Geol. Soc' vol. xliv. 

 p. 58, it is not improbable that this form may be identical with 

 Titanosaurus, on which grounds it is placed here. 



Dinodocus mackesoni, Owen 2 . 

 The type species. 

 Hob. Europe (England). 



14695. A series of broken limb and pelvic bones ; from the Lower 

 (Fig.) Greensand of Hythe, Kent. The type specimens ; disco- 

 vered in 1840. Described by Owen in the ' Proc. Geol. 

 Soc' vol. iii. pp. 325, 451 (1842) ; and figured by the same 

 writer in his ' Cretaceous Eeptilia ' (Mon. Pal. Soc), pt. i. 

 pis. xii., xiii. (185 J), under the name of Polyptychodon 

 continuus. Presented by P. II. Mackeson, Esq., 1841. 



Genus CETIOSAURUS, Owen 3 . 

 The type genus. Caudal vertebra) amphiccelous. 



1 History of British Fossil Eeptilia, Index to vol. ii. p. ix (1884). 



2 Loc. cit. 



3 Kep. Brit. Assoc, for 1841, p. 94 (1842). 



