6 MR. G. A. BOULENGER ON CHELONIAN REMAINS. [Jan. 6, 



2. On a Tiionyx-skull from the Upper Eocene of Hordwell, 



Hampshire. 

 I was very much pleased to find among some unnamed fossils from 

 Hordwell, presented by Alex. Pytts Falconer in 1850, an excellent 

 skull of Trionyx, which is the more valuable from the fact that, so far 



Skull of Trionyx hurum. Nat. size. 



Fig. 5. 



Skull of Trionyx planus (?). Nat. size. 



as is known to me, no skull of Trionyx has yet been described from 

 these beds. It affords conclusive evidence that the English Eocene 

 shells and mandibles referred to Trionyx belong to that genus sensu 

 stricto, and further corroborates Mr. Lydekker's statement that a 

 mandible from Hordwell in the British Museum (Cat. Foss. Rept. iii. 



