58 



xxix. p. 511, pis. xvi., xvii. In the restoration given by- 

 Owen (fig. 14), the introduction of a postarticular process 



Fig. 14. 



Odontojytcryx toHapica. — Lateral aspect of the skull as restored by Owen ; from 

 the London Clay, f . There is no evidence for the presence of a post- 

 articular process to the mandible. 



to the mandible is probably incorrect. It is probable that 

 the small vacuity on the left side is the posterior part of 

 the nares. The deep grooves on the maxiUa and mandible 

 indicate that the horny sheath was composed of several 

 distinct ]5ieces, as in Sulci and Tacliypetes. 



Purchased, 1873. 



The two following specimens are provisionally referred to this species. 



A. 224. The proximal extremity of the left ulna ; from the London 

 Clay of Sheppey, This specimen agrees in size with the 

 corresponding bone of Sula hassana ; and if referable to 

 the same sex as the type skull indicates that the wings of 

 the present form were smaller in proportion to the skull 

 than in Sida. The general characters of this bone are 

 essentially those of the Steganopodes ; except for its much 

 smaller size, it is scarcely distinguishable from the corre- 

 sponding bone of Argillornis longipennis (p. 49). 



Presented hy Sir R. Oiuen, K.C.B., 1884. 



A. 134. The proximal extremity of a right tarso-metatarsus ; from 

 the London Clay of Sheppey. This specimen is nearly 

 the same size as the corresponding bone of a large 

 Cormorant, and if referable to the present species would 

 indicate that the hind limbs of Odontopteryx were rela- 

 tively small, as in several existing forms of Steganopodes. 



