146 



DINOSATTRIA. 



Genus ORNITHOPSIS, Seeley \ 



Including Eacamerotns, Hulke 2 . 



Chondrosteosaurus, Owen 3 . 

 Gigantosaurus, Seeley 4 . 

 Ischyrosaurus, Hulke 5 . 



Apparently closely allied to the American Brontosaurus. Number 

 of sacral vertebras unknown. 



The probability of Pelorosaurus being identical has been men- 

 tioned under that head. 



Ornithopsis hulkei, Seeley 6 . 



Syn. Bothriospondylus magnus, Owen 7 . 



Chondrosteosaurus gigas, Owen 8 (in parte). 

 Chondrosteosaurus magnus, Owen 9 (in parte). 

 Ornithopsis eucamerotus, Hulke 10 . 



The type species. Fully equal in size to Brontosaurus excelsus, 

 Marsh, of which the length is estimated at 50 feet. The length of 

 the cervical vertebras is usually about 0,350 (12 inches), and that 

 of the larger specimens from the dorsal region 0,230 (8 inches). 



Hob. Europe (England). 



The reference of some of the vertebrae is provisional ; all the 

 following specimens were obtained from the Wealden. 



R. 964. A nearly entire tooth, probably belonging to the present 

 (Fig.) form ; from Brixton Bay, Isle of Wight. Figured by 

 Wright in the 'Ann. Mag. Nat. Hist.' ser. 2, vol. x. p. 90 

 (1852), as the tooth of an unknown reptile ; and also by 

 Owen in his e British Fossil Reptilia,' vol. iii. p. 422, 

 where it is provisionally referred to Pelorosaurus ; and by 

 the present writer in the ' Quart. Journ. Geol. Soc' vol. 

 xliv. pi. iii. fig. 4. The superiority in the size of this 

 tooth (fig. 24) over that of Morosaurus (fig. 20) renders it 



1 Ann. Mag. Nat. Hist. ser. 4, vol. v. p. 279 (1870). 



2 Quart. Journ. Geol. Soc. vol. xxviii. p. 36 (1872). Eeference in this 

 passage is made to vol. xxvi. p. 318 (1870), but the name does not occur there. 



3 Wealden and Purbeck Reptilia (Mon. Pal. Soc), suppl. vii. p. 7 (1876). 



4 Index to Aves &c. in Cambridge Museum, p. 94 (1869). — Not figured. 



5 Quart. Journ. Geol. Soc. vol. xxx. p. 16 (1874), — Preoccupied by Cope, 

 Trans. Amer. Phil. Soc. vol. xiv. pt. 1, p. 38 (1870). 



8 Ann. Mag. Nat. Hist. ser. 4, vol. v. p. 283 (1870). 



7 Mesozoic Keptilia (Mon. Pal. Soc), pt. ii. p. 24 (1875). 



8 Wealden and Purbeck Ecptilia (Mon. Pal. Soc), suppl. vii. p. 5 (1876). 



: ' lhid. ]). 7. 10 Quart. Journ. Geol. Soc vol. xxxviii. p. 375 (1882). 



