214 



REPTILIA 



CLASS III 



Pelagosaurus, Bronn (Fig. 313). Like the preceding, but much smaller, 

 the snout tapering more gradually, and orbits laterally directed. Antorbital 

 vacuity much reduced or absent; suborbital vacuity in the palate large; 

 posterior narial opening of pyriform outline. P. typus, Bronn, about 1 m. in 

 length ; some species 2 m. Upper Lias of Southern Germany and France. 



Steneosaurus, Geoff. (Sericodon, v. Meyer). Differs from Mystriosawus in 

 having the posterior narial opening rounded, palatines more expanded, and 

 fr.nital small. Upper Lias to Kimmeridgian. 



TeUosawus, Geoff. (Figs. 314, 315). Skull much elongated and narrow; 

 snout flattened, thin, with rectilinear edges ; teeth curved outwards ; orbits 



A 



B 



Fig. 315. 



Teleosaurxis cadomensis, Cuvier .sp. Bathonian ; Normandy. 

 Portion of dorsal (.1), and, ventral (B) armour (restored after E. Deslongchamps). 



circular, superiorly directed. Dorsal scutes longitudinally keeled in sacral and 

 caudal regions; ventral armour extending between the limb girdles. Lower, 

 Middle, and Upper Jura. T. cadomensis, Geoff. 



Aeolodon, v. Meyer; Crocodileimus, Jourdan ; Teleidosaurus, Deslong. Upper 

 Jura. 



Family 2. Metriorhynchidae. Zittel. (Thalattosuchia, Fraas.) 



Orbits entirely enclosed, elongated, laterally placed, with sclerotic ring. Pre- 

 frontals large; nasals broad, widening the snout region posteriorly; lachrymals 



