Geological Society of London. 571 



serrations that had been made did not seem to him to apply. What 

 he does affirm as certain is that the method he has indicated, requiring 

 for its data a more extended experimental knowledge of the relations 

 between temperature and pressure in aqueous vapour, and a more 

 exact knowledge of the total volume of water now upon our terraque- 

 ous globe, affords the means of determining the temperature of our 

 oceanic water at every period, from that of the primordial ocean to 

 our own day. 



2. " On the Fish-remains found in the Cannel Coal in the Middle 

 Coal-measures of the West Biding of Yorkshire, with the description 

 of some new Species. " By James W. Davis, Esq., F.G-.S., etc. 



The remains described by the author were from a bed of Cannel 

 Coal about 400 feet above the base of the Middle Coal-measures, and 

 were chiefly obtained from this bed at the Tingley Colliery. The 

 author described the general geological structure of the district. At 

 Tingley the fish- remains were stated to occur in greatest abundance 

 between the Cannel Coal and the " hubb " ; but they are also found 

 in both those portions of the deposit. Of known species the author 

 has identified : — Coelacanthus Upturns, Ctenodus elegans, Megalichthys 

 Hibberti, Bhizodopsis, sp., Palceoniscus, sp., Gyracanthus formosus, Cte- 

 nacanthus horridus, Diplodus gibbosus, Ctenoptychius pectinatus, Helodus 

 simplex, teeth of Cladodus and Petalodus, scales of Rhizodus, ribs and 

 bones of Ctenodus, Pleur acanthus l&vissimus, and six other species, 

 and the following which are described as new forms : — (1) Compsa- 

 canthus triangularis, (2) C. major, and (3) Ostracocanthus dilaiatus, 

 the type of a new genus resembling Byssacanthus, Agass. The teeth 

 of Coelacanthus were said to be small and sharply pointed ; they have 

 not been found attached to the jaw, but in certain specimens of the 

 latter the alveolar spaces are well shown, extending in a single row 

 along the rami. The air-bladder of this genus is also said to be pre- 

 served, and to present some resemblance to the bony air-bladders of 

 Siluroid fish inhabiting the fresh waters of Northern India ; and in 

 general the author dwelt at considerable length upon the possible re- 

 lationships existing between the fishes whose remains he described 

 and the Teleostean Siluroids and Ostracion. 



3. " On the Skull of Aryillomis longipennis, Owen. " By Frof. B. 

 Owen, C.B., F.B.S., F.G-.S., etc. 



In this paper the author described a fragmentary cranium from the 

 London Clay of Sheppey, from which it was procured by W. H. 

 Shrubsole, Esq., who also furnished him with the humerus described 

 in a former paper under the name of Argillornis longipennis. 1 In 

 the present specimen the lower jaw and the fore part of the upper 

 jaw are deficient. The author described the characters presented by 

 the specimen in detail, and stated that, like those of the humerus pre- 

 viously described, they seemed to approximate the fossil most nearly 

 to the Albatross among existing birds, although, like Odontopteryx, it 

 differed from Diomedea and also from the Cormorant and the Totipal- 

 mates generally, in the absence of the basirostral external nares and 

 of the supraorbital gland-pits. The present fossil differs from Odon- 

 1 Quart. Journ. Geol. Soc. vol. xxxiv. p. 124. 



