400 PROCEEDINGS OE THE GEOLOGICAL SOCIETY. [June 23, 



much more carefully executed than Quenstedt's, might have been 

 drawn from one of our crowns, so complete is the resemblance. 



The teeth of the Kimmeridge Saurian, like those of DaJcosaurus, 

 are slightly incurved, slightly backward-curved, laterally compressed, 

 and unequally convex. They have a serrated front and back cut- 

 ting edge, and they are finely striated. They are stouter than the 

 teeth of Megalosaurus ; their curve is also less sickle-like ; and the 

 serrature of their trenchant ridges is less coarse than that of this 

 Dinosaur. 



But, because comparison with actual specimens is more satisfactory 

 than that with descriptions, however close to nature these may be, 

 I have compared our teeth with other Dakosaurian teeth in the Bri- 

 tish Museum, and I have found them to be specifically identical*. 



lY. That Dalcosaurus is probably the same as Cuvier's " deuxieme 

 Gavial de Honfleur, tete a museau plus court," follows as the 

 necessary consequence of the II. and III. of these conclusions, 

 because, if this Kimmeridge crocodihan is identical with each of 

 these, they must be identical with each other. 



If these conclusions be ultimately proved correct, I would propose 

 to retain Geoffiroy St.-Hiliare's original name Steneosaurus rostro- 

 minor, to the exclusion of all given subsequently to his Memoir of 

 1825. 



iVbi^. — Since this paper was written, a further examination of the 

 fossils presented to the British Museum has led to the discovery of a 

 considerable part of the skull, with the complete snout, of this Kim- 

 meridge crocodilian. I shall take an early opportunity of com- 

 municating a description of it to the Society. — J. W. H., Oct. 17, 1868. 



EXPLANATION OF PLATES. 

 Plate XYII. 



Fig. 1. Upper view of end of upper jaw of the Kimmeridge Gavial-like Croco- 

 dile, showing front half of subterminal nostril. 



2. Side view of the same. 



3. Posterior view of the same. 



4. Outer view of right half of lower jaw of the samet. a, rib ; b, part of the 



femur ; c, part of the left half of the lower jaw, reversed. (This last I 

 at first conjectured might be a crushed piece of the upper jaw.) 



Plate XYIIT. 



Figs. 1 & 2. Side and front views of the neural arch and spine of a vertebra. 

 a, prezygapophysis. 



3. A trunk- vertebra, showing the anterior articular surface, the neural canal, 



and the long transverse process. 



4. Side view of an early dorsal vertebra. There is a costal facet on the an- 



terior margin of the transverse process near its root, i 



* I greatly regret not to have had the advantage of seeing in print Mr. Mason 

 Wood's paper on DaJcosaurus, read in the early part of this session — the more 

 so that, although present on the evening on which it was communicated to the 

 Society, my mind being preoccupied by another subject, I did not give Mr. 

 Wood's paper the attention it deserved. 



t As the portions of this jaw entrusted to me by Mr. Mansel have been found 

 to fit those in the British Museum, the jaw is shown in a single drawing after 

 restoration. 



