Reptilian Notes. 133"- 



with its outer and inner surfaces separated by a prominent ridge, 

 and its enamel strongly corrugate, i 



The teeth of the Lightning Ridge reptile, on the other hand, are., 

 so far as at present known, alike, sharply conical above the alveolar 

 border, with a slight inward curvature, and barely any difference 

 in size amongst the six. By their regularity of disposition and 

 similarity of form, these teeth partake far more of the Gavilian 

 than the Crocodilian type, with the exception of those of Grocodilus 

 johnstoni, Krefft, inhabiting the upland waters of North Australia. 

 In this comparatively small species the forward teeth are of the 

 same type as those of our fossil, within certain limits of the same 

 size, and inwardly curved. 



This remarkable fossil is certainly worthy of a name, and for it 

 I propose that of Orocodilus (1 Bofosauriis) ftela-^lophensis'- 



EXPLANATION OF PLATE VIIT. 



Fig. 1. Exterior view of right clentary, with six arterial fora- 

 mina, the terminal posterior dumb-bell-shaped, of MegaJania 

 prisca, Owen. 



Fig. 2. Interior view of the subject of Fig. 1 with impressions 

 of seven teeth along the alveolar border, one nearly entire 

 tooth and a partially decayed one, nine in all. 



Fig. 3. Posterior view of the dorsal vertebra from the Welling- 

 ton Cave Reserve, with the transverse process on the right 

 hand side of the figure nearly complete. 



Fig. 4. Side view of the subject of Fig. 3, exhibiting the rotun- 

 dity and convexity of the articular ball of the centrum. 



Fig. 5. Palate of the Water Monitor (Varanus salvator) for com- 

 parison of the right and left dentaries with Fig. 2. 



Fig. 6. Six large and three small dermal scutes of a Lacertilian, 

 exterior view. 



Fig. 7. The same specimen, inner view. 



Fig. 8. Another example with five lai'ge and three small dermal 

 scutes. 



Fig. 9. Osseous dermal scute of the Shingle-back {Trnclnjsaiirus 

 rugosus)— x 11 diam. 



Fig. 10. Grocodilus (? Botosaurus) selaslophensis, Eth-fil. Por- 

 tion of ramus with six teeth seen from the side — nat. 



Fig. 11. The same specimen seen from above — nat. 



1 Leidy. Loc. cit., p. 13. 



2 (jcXas = lightning ; Xo(f>OS = ridge ; and ennis. 



