16 OKNITHOSATTRIA. 



premaxillary rostrum is much less deep than in the preceding 

 species ; and the dental alveoli are relatively larger, and separated 

 from one another by longer intervals. 

 Hah. Europe (England). 



R. 540. The extremity of a mandibular symphysis, showing three 

 pairs of dental alveoli, which agree in relative size and 

 position with those of the type premaxillary rostrum 

 figured by Owen, op. cit. pi. i. fig. 3. Purchased, 1885. 



Ornithochirus (?) simus (Owen *). 



Syn. Pterodactylus simus, Owen 2 . 

 Criorhynchus simus, Owen 3 . 

 (?) Pterodactylus ivoodwardi, Owen 4 . 



Of very large size, and characterized by the great depth and 

 bluntness of the muzzle. If, as is very probable, this species should 

 prove generically distinct from the preceding forms, the name 

 Criorhynchus might be retained for it 5 . 



Hah. Europe (England). 



35412. Fragment of the muzzle ; from the Cambridge Greensand. 

 This specimen, although rather smaller, agrees with the 

 type example figured by Owen in his ' Cretaceous Eeptilia,' 

 3rd Suppl. pi. i. figs. 1, 2, as belonging to the upper jaw, 

 but is referred by Seeley (' Ornithosauria,' p. 127) to the 

 mandible. Purchased, 1859. 



R. 546. Fragment of the extremity of the prem axillae, not impro- 

 bably belonging to a larger individual of the present 

 species ; from Cambridgeshire. This specimen, which 

 apparently agrees in character with the one figured by 

 Owen, op. cit. pi. ii. fig. 3, under the name of Pterodac- 

 tylus ivoodwardi, if rightly determined, would indicate the 

 correctness of Seeley's view as to the position of the type 

 specimen, and also that P. ivoodwardi may be a synonym 

 of this form. Purchased, 1885. 



1 Cretaceous Eeptilia (Mon. Pal. Soc), 3rd Suppl. p. 2 (I860).— Pterodactylus. 



2 Loc. cit. 3 Mesozoic Eeptilia (Mon. Pal. Soc), pt. i. p. 7 (1874). 

 4 Cretaceous Eeptilia, op. cit. p. 4. 



6 In the preliminary publication of the name Ornithochirus (Seeley, Index 

 to Aves &c. in Camb. Mus. p. xvi [1869]) it was applied to this species ; but in 

 the later memoir (' Ornithosauria,' p. 127) the forms with spear-shaped jaws 

 were taken as the types. See also Geol. Mag. 1881, pp. 15, 16. It would 

 apparently only lead to worse confusion to revert to the original application of 

 the name. 



