Geological Society of London. 367 



close relation to the humerus of existing Crocodilians, from which, 

 however, it differed in its being less curved and by its great size. 



He next referred to its differences from the humerus of the Dino- 

 saurs Iguanodon, and Hylceosaurus, and remarked that it most nearly 

 resembled the large limb-bone on which Mantell founded his genus 

 Pelorosaurus. 



3. "■ Note on some fossil remains of a Ga vial-like Saurian from 

 Kimmeridge Bay, establishing its identity with Cuvier's ' Deuxieme 

 Gavial d'Honfleur' and Avith Quenstedt's Dakosaurus.'" By J. W. 

 Hulke, Esq., F.E.S., F.G.S. 



The fossils which formed the subject of this communication were 

 also collected by Mr. Mansel in Kimmeridge Bay. They demon- 

 strated the existence of a Saurian having long subincurved, subretro- 

 curved, laterally compressed, unequally convex teeth, with an anterior 

 and a posterior finely serrated edge, loosely implanted in distinct and 

 separate sockets, and vertically replaced by young teeth rising into 

 the base of the large open pulp-cavity of the fang of the old tooth. 



The lower jaw, of which the greatest jjart of the right half is pre- 

 served, is about 40 inches long. The symphisis is very long, and in- 

 cludes the opercular bone. The upper jaw shows a terminal, undi- 

 vided nostril, not inflated laterally as in Teleosaurus. The lines 

 of the jaws seem to merge into the cranium less abruptly than in the 

 living Gravial, which gives the outline of the head a greater resem- 

 blance to Mecistops. The vertebrce are biconcave, and the outer sur- 

 face is hollowed and somewhat overhung by the roundish articular 

 surfaces. The transverse processes are long and directed outwards, 

 and slightly backwards and downwards ; their posterior border thick, 

 the anterior thin. The ribs have bifurcated spinal ends. The femur, 

 14 inches long, resembles that of the living Crocodilians, only it is 

 less twisted. 



The structure of the jaw, the form and attachment of the teeth, 

 and the manner of their succession, with the form of the vertebree 

 and ribs, proved this Kimmeridge Saurian to be a Crocodilian (and 

 not a Lacertilian) resembling a bastard Gavial. The author next 

 demonstrated its identity with Dakosaurus, Quenstedt, and hence 

 with Geosaurus maximus, Plieninger ; and he expressed a belief that 

 it was also generically identical with Cuvier's Honfleur Gavial, "tete 

 a museau plus court," and Geoffrey St. Hilaire's Steneosaurus rostro- 

 minor. 



Discussion. — Mr. Seeley remarked that in the base of the Oxford Clay, there was 

 what he regarded as a peculiar form of DakosaurHn, with two serrated ridges close 

 together on one side of the tooth, and one on the other. Vertebras of similar char- 

 acter to those exhibited occurred in the Kimmeridge Clay at Ely, but the teeth were 

 rarely perfect. The author's conclusions confirmed his own surmises. 



4. " On the Geology of a Portion of Abyssinia." By William T. 

 Blanford, Esq., F.G.S. etc. 



This paper contained a brief description of the principal geological 

 observations made by the writer when accompanying the late Abys- 

 sinian expedition. After referring to the notices by previous ex- 

 plorers, he gave a list of the different formations met with, viz. — 1. 



