CROCODILIA. 



299 



ccelia,' cupped beliind .* In a third family the front surface 

 (ib. 3, a) is concave, the hind one convex ; this character is 

 expressed by the term 'proccelia,' cupped in front, t All 



Fig. 103. 



i. Teleosaurus brevirostris, Ow. ; Upper Lias, Whitby. 



2. Streptospondylus Cuvieri, V. M. ; Upper Oolite, Honfleur. 



3. Crocodilus toliapicus, Cuv. ; Eocene, Sheppy. 



4. Dolichosaurus longicollis, Ow. ; Chalk, Sussex. 



5. Palseophis toliapicus, Ow. ; Eocene, Sheppy. 



6. Laophis Crotalo'ides, Ow. ; Tertian, Salonica. 



existing and tertiary crocodilians are procoelian. The zyga- 

 pophysis, z, by the upward or inward aspect of its articular 

 surface, marks the fore part of the vertebra. 



Sub-Order 1. — Amphicohlia. 



Crocodiles closely resembling in general form the long 

 and slender-jawed kind of the Ganges called "gavial" or 

 "gharrial," existed from the time of the deposition of the 

 lower lias. 



Their teeth were similarly long, slender, and sharp, adapted 



* Opisthos, behind ; koilos, hollow ; vertebra concave behind, convex or flat 

 in front. 



f Pros, front ; koilos, hollow ; vertebra with the cup at the fore part and the 

 ball behind. 



