Geological Society of London, 287 



Prof. Owen in his later views of the affinities of Thylacoleo, and 

 pointing out in detail its relations, especially with the liat Kan- 

 garoos (Hypsiprymniis), and the Phalangers (Phalangista), demurred 

 to the soundness of the conclusion as to its predaceous habits. He 

 remarked that, as the greater number, if not all, of the known 

 animals of the group to which Thylacoleo undoubtedly belongs, are 

 either vegetable or mixed feeders, the probabilities would be that 

 this creature conformed with its congeners in this respect, unless it 

 possessed any such striking adaptive modification of the normal 

 typical dentition of the group as to lead to a directly opposite con- 

 clusion. 



He then proceeded to discuss this question, showing that in its 

 rodent-like incisors, rudimentary canines, and hypsiprymnoid pre- 

 molars it presents no sufficient approximation to any of the true 

 predaceous carnivores, either placental or marsupial, as in his 

 opinion to justify the inference as to its habits, which is expressed 

 in the name bestowed upon it. 



2. " On the Thickness of the Carboniferous Kocks of the Pendle 

 Range of Hills, Lancashire." By E. Hull, Esq., B.A., E.E.S., 

 F.G.S., of the Geological Survey of Scotland. 



This paper was supplementary to a former communication by the 

 author, in which he endeavoured to prove the south-easterly attenua- 

 tion of the Carboniferous sedimentary strata of the North of England, 

 while the calcareous member (the Mountain-limestone) attained its 

 greatest vertical development in Derbyshire, and thence thinned 

 away northward and westward. The author now gave the results 

 of his subsequent investigations while engaged in the survey of the 

 Pendle range and the neighbourhood of Burnley and Blackburn, 

 which have shown that the increase in the thickness of the sedimen- 

 tary deposits is continued into that district, the aggregate thickness 

 of the Coal-measures, the Millstone-grit, and the Yoredale series 

 being in the Burnley district 18,635 feet, while in Leicestershire it 

 has dwindled down to 3,100 feet. In discussing the question of the 

 source of these sediments, the author came to the conclusion that 

 they were derived from a primaeval Atlantis, — a view which he 

 considered to be strengthened by the fact that the Carboniferous 

 sedimentary strata of North America also swell out towards the 

 north-east, and become attenuated towards the south and west. 



3. " Observations on the relative Ages of the leading physical 

 Features and Lines of Elevation of the Carboniferous district of 

 Lancashire and Yorkshire." By E. Hull, Esq., B.A., F.E.S., of 

 the Geological Survey of Scotland. 



The author first described the Pendle Range as a great arch of 

 Carboniferous rocks, bordered on the north and south by a succession 

 of parallel (W.S.W. to E.N.E.) arches and troughs, to all of which 

 he assigned a Pre-Permian age. He regarded them as belonging 

 to the earliest of three consecutive periods of disturbance, to which 

 all the principal flexures and faults of the district may be referred. 

 The Pennine Chain, which runs nearly north and south, he believed 

 to have been upheaved during a later period, namely, the close of 



