Geological Society of London. 331 



character of family value, and the author remarked upon the interest 

 of the continuance of a common Ichthyic and Batrachial dental 

 character in exceptional cases among the Reptilia up to the establish- 

 ment of the Crocodilian type, above which, in the vertebrate series, 

 calcined palatal teeth no longer appear. 



2. " Note (3rd) on Eucamerotiis, Hulke, Omithopsis, Seeley, = 

 Bothriospondylus magmis, Owen, = Chondrosteosaurus magnus, Owen." 

 By J. W. Hulke, Esq., F.E.S., F.G.S. 



In this paper the author gave a description of an unusually perfect 

 dorsal vertebral centrum of Omithopsis, and some additional informa- 

 tion respecting the cervical and anterior dorsal vertebras. He further 

 compared the prosacral vertebra? with those of several recently dis- 

 covered Dinosaurians of the Colorado region, showing several agree- 

 ments, but also such differences as to prove the generic distinctness 

 of Omithopsis. He discussed the question of the nomenclature of the 

 species indicated in the title of his paper, and maintained that the 

 name Omithopsis ought to be adopted for the single genus to which 

 he referred them. 



3. " Description of the species of the Ostracodous genus Bairdia, 

 M'Coy, from the Carboniferous Strata of Great Britain." By Prof. 

 T. Rupert Jones, F.R.S., F.G.S., and James W. Kirkby, Esq. 



The long persistence of the genus Bairdia, from the Silurian 

 period to the present day, and its essentially marine character, were 

 first noticed ; also the relatively rare occurrence of any species of 

 Leperditia, Beyrichia, and KirJcbya (associates of Bairdia in Carboni- 

 ferous strata) in freshwater or estuarine beds. Carbonia, on the 

 other hand, was confined to the fresh or brackish waters in which the 

 Coal-measures were formed. The difficulty of defining the species 

 of Bairdia from carapace-valves alone, without limbs and soft parts, 

 and the possibility of several genera being grouped under this head, 

 were mentioned. The species of Bairdia described and figured in 

 this paper were, it is believed, all that have been found in the British 

 Carboniferous rocks, with the exception of M'Coy's B. gracilis. Two 

 of Count Miinster's Bavarian Bairdiai, from Hof, have not yet occurred 

 with us ; neither have four of Dr. D'Eichwald's Russian Carboni- 

 ferous species, nor the Australian B. affinis, Morris. Including these, 

 there are twenty-three known Carboniferous species of Bairdia. 

 Seven of these are recurrent in the overlying Permian limestones, 

 which have yielded twelve species of this genus. With six Silurian 

 forms, there are altogether thirty-four recorded Palasozoic species of 

 Bairdia. 



4. "Report on a Collection of Fossils from the Bowen River 

 Coal-field and the Limestone of the Fanning River, North Queens- 

 land." by R. Etheridge, Esq., jun., F.G.S. 



The collection on which the present paper was founded had been 

 received from Mr. R. L. Jack, F.G.S.. and the information furnished 

 by it was supplementary to that obtained from Daintree's collection. 

 The fossils are from three distinct horizons. The author first briefly 

 described the geology of the formations from which the fossils were 

 derived, and stated that the results of his investigations led him to 

 refer those from the Fanning River Limestone to the Devonian, those 



