138 Beports and Proceedings. 



latus, have been recorded hitherto only from Eedcar, to the beds at 

 which place the author referred; but the chief object of the paper 

 was to describe some sections at Cliff, near Market Weighton, 

 where these and lower beds are well exposed, and have yielded a 

 numerous suite of fossils. He considered, however, that these beds 

 did not belong to the typical Yorkshire area, but were the thin end 

 of the series which stretches across England. He supposed there had 

 been a barrier in Carboniferous times, which had separated the coal- 

 fields of Yorkshire and Durham, prevented the continuity of the 

 Permian beds, and curved round the secondary rocks to the north of 

 it, to form the real Yorkshire basin, while these beds at Cliff were 

 immediately to the south of it. 



The sections described were six in number, the first pit yielding 

 the great majority of the fossils, and the third showing best the 

 succession of the beds. The fossUs could be mostly identified with 

 known forms, and showed a^ striking similarity to the Hettangian 

 fauna. In all the clays of the Infralias Foraminifera were numerous 

 and varied. 



The section in pit No. 3 showed, commencing at the top : — 1. Stone 

 bed with^m. angulatus (the fossiliferous bed of pit No. 1). 2. Thick 

 clays, with bands of stone characterized by Am. Johnstoni. 3. One 

 band of clay with Am. planorhis. 4. Thin-bedded stones and clays, 

 some of them oyster -bands. 5. Clays without Foraminifera, and 

 with impressions of Anatina (White Lias). 



The Avicula-contorta series is not reached, nor are there any signs 

 of the bone-bed, as the junction with the Keuper marls, which are 

 found three miles off, is not seen. 



The paper was followed by references to the fossils mentioned, in- 

 cluding the description of those that are considered new. 



DiscirssioN. — Prof. Duncan remarked that English geologists had been backward 

 in receiving the term Infralias, which he had suggested with respect to the Sutton 

 Down beds some years ago, and the propriety of which was shown by the term having 

 been applied to the same beds by French geologists at a still earlier period. As to 

 the White Lias, he regarded it as a mere local deposit, not to be found out of England. 

 He traced the existence of the Infralias from Luxembourg through France into South 

 "Wales, where Corals were abundant. In Yorkshire, though one fine Coral had been 

 found, the Ammonites seemed to point to a difference in condition. 



Mr. Hughes remarked that the lithological character of the beds, as described by 

 the author, did not agree with that of the Infralias in the S.W. of England or the N. 

 of Italy. That the palseontological evidence which had been laid before the Society 

 did not confirm the view that they were Infralias, the author having especially noticed 

 the absence of Avicula contorta where he expected that it should occur. Also, by 

 reference to the author's section, Mr. Hughes pointed out that below what he de- 

 scribed as Infralias he drew other beds which were not Trias, the author having ex- 

 plained that some beds which had been called Trias were only stained beds of Liassic 

 age. 



The Eev. J. F. Blake, in reply, acknowledged the difference between the Yorkshire 

 section and those of the neighbourhood of Bath, but insisted on the similarity of the 

 fossils. 



ni.— February 7, 1872.— Joseph Prestwich, Esq., F.E.S., Presi- 

 dent, in the Chair. — The following communications were read: — 1. 

 " Further Notes on the Geology of the neighbourhood of Malaga." 

 By M. D. M. d'Orueta. Communicated by the President. 



