TELEOSAURID^S. 95 



The generic reference of the following specimen is provisional. 



40428. The centrum and part of the arch of a large dorsal vertebra; 

 from the Neocomian of Potton (derived). 



Purchased, 1867. 



Genus METRIORHYNCHUS, Meyer 1 . 



Syn. Cricosaurus, Wagner 2 . 



(?) Gnathosaurus, Meyer 3 . 

 (?) Rhacheosaurus, Meyer 4 . 

 (?) Crocodilcemus, Jourdan 5 . 



The skull (fig. 14) generally longer and more slender than in 

 Dacosaurus, with a slight prem axillary expansion, and with 

 sculpture ; splenial part of mandibular symphysis forming a narrow 

 elongated triangle ; palatal aspect of anterior part of maxillae and 

 mandible channelled ; teeth usually more numerous, slender, slightly 

 curved, carinated, and frequently with the enamel fluted. 



Pig. 14. 



Metriorhynchus kastifer, Deslongchamps. — The cranium ; from the Kimeridge 

 Clay of Normandy, f . pmx, premaxilla ; mx, maxilla ; na, nasal ; la, 

 lachrymal ; fr, frontal ; or, orbit. {After Deslongchamps.) 



This genus has been the subject of great confusion owing to the 

 false restoration of the original Honfleur skulls, and its real defi- 

 nition must date from the description of Deslongchamps. Crico- 

 saurus, of the Solenhofen Limestones, presents all the characters of 



1 Paheologica, p. 106 (1832). For application, see page 91, note 2. 



2 Abh. k.-bay. Ak. Wiss. vol. viii. p. 417 (1860). 



3 Museum Senckenburg, vol. i. p. 3 (1834). 



4 Nova Acta Ac. Caes. Leop.-Car. vol. x. pt. 2, p. 173 (1831). 



5 Quoted in Deslongchamps' 'Notes Paleontologiques,' p. 119 (1867). 



