WEALDEN CROCODILES. 431 



Examples of the successional teeth are shown at a, fig. 3, PI. 11, and at «, fig. 2, 

 PI. 12. 



Since the characters of the teeth in the Purbeck Goniopholis are only known by 

 the two posterior ones of the lower jaw, the Wealden species may be distinct. 

 The large intervals and unequal size of the teeth behind the anterior four or five 

 mandibular teeth are shown in PI. 11, fig. 4, and 11, 12, figs. 3, 3, a, and 4, from 

 the Wealden specimen. 



Cervical Vertehree {'Crocodilia,'' PI. 10, figs. 1 — 5.) 



The three vertebrae represented in the above-cited plate were obtained by Mr. 

 Holmes from the same bed of Wealden clay, at Cuckfield, as the teeth and scutes 

 characteristic of the genus Goniopholis, to which, therefore, I refer them. They 

 correspond with the fourth, fifth, and sixth cervical vertebra? of the recent Crocodile, 

 having a parapophysis similar in form, extent, and position, with traces of a short 

 and thick hypapophysis (comp. fig. 1, PI. 10, with fig. 2, A, PI. 3, a) at the fore part of 

 the under surface ; but behind this the under surface of the Wealden vertebra is less 

 convex, the whole centrum is relativelybroader, and the more important difference of 

 the concavity of the hinder as well as of the front articular end manifests the distinct 

 family of Crocodilia to which the Goniopholis belongs. The depth of the concavity of 

 these surfaces exceeds that in Teleomurus. The free surface of the centrum is smooth. 

 The neural arch articulates with the whole length of the centrum, which is impressed 

 by a neural channel, slightly widening behind, between the neurapophysial surfaces 

 (PI. 10, fig. 5). Two vertical, venous canals open into the neural canal. Fig. 6 is the 

 side view of a cervical centrum from the Purbeck beds, having the general proportions 

 of those of Goniopholis, but differing in the smaller size of the parapophysis. Figs. 

 7 — 9 are views of the centrum of a dorsal vertel)ra of a Wealden Goniopholis, fig. 9, 

 showing the texture as displayed by a vertical longitudinal section. This shows a 

 close, cancellous structure throughout, whereas the centrums in the Teleosaurus 

 (PI. 9, fig. 6) exhibit a more open, reticulate texture, with a cavity near the centre. 



One of the posterior caudal vertebrae, after the subsidence of the diapophyses 

 and the great reduction of the zygapophyses, shows the spinous process rising 

 from the hinder half the neural arch, as at ff, PI. 13. 



The coracoid (PI. 13, /') difi"ers from that of the existing Crocodiles in its greater 

 relative breadth at the neck or part marked k, in the more gradual and minor 

 expansion of its mesial end, and in the more regular convexity of its scapular border. 

 It exhibits the same perforation near this border as in the modern Crocodiles. 



The humerus associated with the remains of Goniopholis from the Wealden of 

 Cuckfield has the usual Crocodilian form and sigmoid flexure. Compared with one 



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