216 



EEPTILIA 



CLASS III 



Alligaforellus, Jourdan (Fig. 316). Total length 22 cm. Cranial bones 

 f^intly sculptured. Nasals elongated, and apparently dividing the external 



Fig. 316. 

 Alligator ellus heaumonti, Jourdan. Upper Jura ; Ceriu. Aiii, France, i/o. 



nares. Tail very long ; at least thirty caudals. Lithographie Stone ; Cerin, 

 France. 



Atoposaurus, v. Meyer. Tail very long, comprising over fifty caudals. 

 Dorsal armour not observed. Otherwise like the preceding. Lithographie 

 Stone ; Cerin, France, and Bavaria. 



Family 2. Goniopholidae. {Metamosuchia, Hulke.) 



Small to large-sized crocodiles. Orbits usually smaller than supratemporal 

 vacuities. Internal narial opening remote, at hinder margin of palatines, and 

 bounded in pari hy the ptenjgoids. Dorsal armour comprising 

 two or more longitudinal series of overlapping and sometimes 

 articulating scutes. Ventral scutes suturally wiited. Pur- 

 beckian and Wealden. 



Goniopholis, Owen {Diplosaurus, Marsh ; Amphicotylus, 

 Hyposaurus, Cope), (Fig. 317). Snout moderately long, 

 nasals not quite reaching external nostril ; supratemporal 

 vacuities larger than the orbits. Twenty-three stout 

 teeth on each side of either jaw, carinated and vertically 

 grooved. Ventral armour consisting of seven to ten 

 longitudinal series of polygonal plates united by jagged 

 sutures. Skull in some species attaining a length of 

 70 cm. G. simus, Owen, known by complete skeletons 

 Fig. 317. about 2 m. long, has limbs of equal size. Purbeckian 



Goniopholis simus, Owen, and Wealden ; England, Belerium, and Northern Germany. 



Purbeckian ; Swanage, Dor- _^ t r>( i i 



setshire. Posterior portion U pper J Ura ; üolorado. 



cl^päteViorna^fs'nrPaii: Bemissartia, Dollo. Attaining a length of 1 m. 



itiLf' ^^^^^^'^'^ '('*^^'^'' Supratemporal vacuities smaller than the orbits, nasals 

 not reaching the external nostril. Twenty irregulär 

 teeth on each side of either jaw ; fore-limbs much shorter than the hinder 

 pair. Dorsal armour with more than two longitudinal series of over- 



