CROCODILIA. 115 



narrower and flatter than in the Croc, acufiis or Croc. Suchus, and the facial part of the 

 skull becomes narrower before the expansion of the upper jaw, at the figure 13, than it 

 does in either of those species. The narrow elongated nasals on which the figure 15 is 

 placed, extend forwards to the external nostril (22), as in the true Crocodiles, and the 

 alveolar border is festooned as is shown in the side view in PI. 2. The teeth 

 are — — r~=84 in number : they are more uniform in size, and more regularly spaced 

 than in the recent species above cited, and resemble in this respect the teeth of the 

 Crocodilus Schlegelii of S. Midler, which is from Borneo. The extent of the symphysis 

 of the lower jaw is greater in the Crocodilus toUapicus than in the Croc, acidus, and the 

 Sheppy species in this respect more nearly resembles the living species from Borneo 

 above cited. 



Crocodilus champsoides, Owe^i. Plates 2 A, 2B, fig. 2. 



Syn. Crocodile de Sheppy (?), Cnvier. Loc. cit. 



Crococilus Spenceri, Buckland. Bridgewater Treatise, vol. ii, pi. xxv, fig. 1. 



The fossil skull already described establishes the fact of the existence of a true 

 Crocodile in the London Clay at Sheppy, but not of a species with a short and broad 

 snout ; the present specimen equally demonstrates the presence at the earliest period 

 of the Tertiary geological epoch of Crocodilia with those modifications of the cranial 

 and dental structure on which the characters of the restricted genus Crocodilus of 

 modern Zoology are founded, but they are associated with a general form of the head 

 which approaches more nearly to the Gavials than does that of the Crocodilus toUapicus, 

 and which are most nearly paralleled amongst the known existing true Crocodiles by 

 the Crocodilus Schlegelii. This Bornean species was, in fact, originally described as a 

 new species of Gavial, but the nasal bones, as in the fossil from Sheppy figured in 

 PI. 2 A, 15, extend to the hind border of the external nostril. 



The fine subject of Plate 2 A, forms part of the collection of J. S. Bowerbank, Esq. 

 F.R.S., which is well known for its rich and varied illustrations of the fossils of the 

 Isle of Sheppy. 



The following are some of its admeasurements : 



Feet. Inches. Lines. 

 Total length from the occipital condyle to the end of the 



premaxillaries .... 



Breadth across the hinder angles of the supracranial platform 



Do. across the orbits 



Do. of the intertemporal space 



Do. of the interorbital space . 



Do. across the external nostril 

 From the occipital condyle to the orbit 

 From the orbit to the external nostril 



