18 ORNITHOSAURIA. 



35410. The conjoint atlas and axis vertebras, in which the centrum 

 of the latter is rather shorter than in the preceding 

 specimen. Purchased, 1859. 



35410 a. A very similar specimen. Purchased. 1859. 



35242. Another similar specimen, wanting the greater portion of 

 the neural spine. Purchased, 1859. 



35829. The axis vertebra of a form in which the centrum is shorter 

 than in the preceding. Purchased, 1859. 



43982. A very similar specimen. Purchased, 1872. 



43982 a. The axis vertebra of a smaller form. Purchased, 1872. 



46370. Four imperfect cervical 1 vertebras of a large species. 



Purchased, 1875. 



35215, 35223-4, 35423-4. Five imperfect cervical vertebras of 

 large size. Purchased, 1859. 



35215 a. A large imperfect cervical vertebra. Purchased, 1859. 



35245. An imperfect cervical vertebra of a large species. 



Purchased, 1859. 



R. 475. A large imperfect cervical vertebra. 



Presented by Sir R. Owen, K.C.B. 



R. 56. Two large imperfect cervical vertebras. Purchased, 1881. 



R. 549. Five imperfect cervical vertebras belonging to individuals of 

 different sizes. Purchased, 1885. 



43983. An imperfect cervical vertebra of a species of medium size. 



Purchased, 1872. 



43983 a. An imperfect cervical vertebra of a smaller form. 



Purchased, 1872. 



41786. Part of a cervical vertebra of a still smaller form. 



Purchased, 1869. 



35243. Two imperfect vertebras provisionally referred to the cervical 

 region. Purchased, 1859. 



1 In assigning these vertebrae to the cervical region the writer follows Owen, 

 op. ell. 1st Suppl. pi. ii. ; vide supra, note 2; p. 11. 



