380 Reports and Proceedings. 



might be found, there ■would on the whole be a very marked difference between these 

 Atlantic beds and those of the Chalk. 



Mr. Seeley had already, in 1862, put forward views which had now been fully 

 borne out by recent investigation. His conviction was that, from the genera having 

 persisted for so long a time, the genera found in any formation afforded no safe guide 

 as to its age, unless there were evidence of their having since those formations 

 become extinct. 



Mr. Etheridge maintained that the species in different formations were sufficiently 

 distinct, though the genera might be the same. Eecent dredgings had not brought 

 to light any of the characteristic moUuscan forms of the Cretaceous time ; and it 

 would be of great importance to compare the results of future operations with the old 

 Cretaceous deep-sea fauna. 



Prof. Eupert Jones, with reference to the supposed sudden extinction of chambered 

 Cephalopods, remarked that Cretaceous forms had already been discovered in Tertiary 

 beds in North America, and also that cold cui-rents could not have destroyed them, 

 seeing that icebergs came down to the latitude of Croydon in the Chalk sea. 



2. "Note on an Iclitliyosaurus (J. entlieJciodon) from Kimmeridge 

 Bay, Dorset." By J. W. Hulke, Esq., F.E.S., F.G.S. 



In this paper the author described the skeleton of an Ichtliyosaiiriis 

 from Kimmeridge Bay, agreeing in the characters of the teeth with 

 the form for which he formerly proposed the establishment of the 

 genus EntheModon. The specimen includes the skull, a large portion 

 of the vertebral column, numerous ribs, the bones of the breast- 

 girdle, and some limb-bones. The first forty-five vertebral centra 

 have a double costal tubercle. The coracoids have an unusual form, 

 being more elongated in the axial than in the transverse direction, 

 and this elongation is chiefly in advance of the glenoid cavity. The 

 articular end of the scapula is very broad. The paddles are exces- 

 sively reduced in size, the anterior being larger than the posterior, 

 as evidenced by the comparative size of the proximal bones. The 

 species, which the author proposed to name I. entheModon, most 

 nearly resembles the Liassic I. longirostris and I. tenuirostris. The 

 length of the preserved portion of the skeleton is about 10 feet ; the 

 femur measures only 2 inches, and the humerus 2 • 7 inches. 



3. " Note on a Fragment of a Teleosaurian Snout from Kimmeridge 

 Bay, Dorset." By J. W. Hulke, Esq., F.E.S., F.G.S. 



In this paper the author described a fragment of the snout of a 

 Teleosaurian obtained by J. C. Mansel, Esq., F.G.S., from Kim- 

 meridge Bay, and which is believed to furnish the first indication of 

 the occurrence of Teleosaurians at Kimmeridge. The specimen con- 

 sists of about 17 inches of a long and slender snout, tapering slightly 

 towards the apex, where the preemaxillse expand suddenly and 

 widely. The nostril is terminal and directed obliquely forwards ; 

 the prsemaxillge ascend 2 -5 inches above the nostril, and terminate in 

 an acute point ; and each preemaxilla contains five alveoli. The 

 lateral margins of the snout are slightly crenated by the alveoli of 

 the teeth, of which the three front ones are smaller than the rest ; 

 most of the teeth have fallen out, but a few are broken off, leaving 

 the base in the sockets. 



Discussion. — Mr. Seeley thought it likely that Mr. Hulke would eventually be 

 led to re-establish his genus EntheModon. He remarked on the peculiar characters 

 presented by the specimen, and referred especially to the coracoids, which were unlike 

 those of Ichthyosaurus, but presented a close resemblance to those of Flesiosaurus. 

 He considered that there were indications of its having been connected with a car- 



