TRANSACTIONS OP THE SECTIONS. St 



Inf. Oolite. Great Oolite. CorabrMh, 



Carbonate of lime... 89-20 95-346 89-195 



Magnesia '34 -739 '771 



Sulphate of lime ... -09 '204 -241 



Oxide of iron.. 



Alumina 4-14 1-422 2-978 



Phosphoric acid -06 -124 -177 



Soluble silica 2-75 1-016 1-231 



Insoluble sand 3'27 -533 4-827 



Alkaline salts not determined. 



99-85 99-384 99-420 



The cornbrash frequently abounds in fossils ; out of sixty-five species collected 

 more than half were bivalve shells. The author expressed his opinion that certain 

 oolitic Terebratulse (viz. T. digona, obovata, lagenalis, ornithocephala) should be con- 

 sidered as forming only one species, at the same time admitting that these form? 

 characterized particular strata and localities. He also pointed out that nearly half 

 the bivalves, and six out of eight sea-urchins, were identical with species found also 

 in the inferior oolite, but not in the intervening great oolite. 



Notice of the curious Spiral Body in certain Fossil Sponges, and of several 

 other remarkable Fossils from the Yorhshire Strata. By E. Charles- 

 worth, F.G.S. 



Mr. Charlesworth exhibited a diagram of a specimen of Choanites Kmigi, 

 described by Mr. Cunnington at a former meeting of the British Association, and 

 stated that he had formerly doubted the correctness of Mr. Cunnington's account, 

 but now agreed with him that the spiral body was an essential part of the sponge. 

 The remarkable fossils were an Inoceramus from the chalk, and a coprolitic-lpoking 

 substance from the lias. 



On ike Hemains of the Hippopotamus found in the Aire Valley Deposit near 



Leeds. By Henry Denny, A.L.S. (^Communicated by T. P. TbaiBi 



F.L.S.) 



During the last year, in a brick-field near Leeds, have been discovered the remains 

 of the Hippopotamus. From the specimens already placed in the Museum of tha 

 Leeds Philosophical Society, it appears that the bones have belonged to not less 

 than three individuals. Of these, two were adults, but of different size, their molars 

 being considerably worn. The youthful condition of the third is shown by the 

 canine teeth being perfectly smooth and pointed, and by the apophyses having 

 separated from the metacarpals and vertebrae. 



These remains were found at a depth of 9 feet in a bed of clay, and 20 feet above 

 the present bed of the river. This bed of clay, along with sand and gravel, which at 

 distances of even a few yards pass and repass into each other, constitute an extensive 

 flat deposit in the lower valley of the Aire, commencing a little above Leeds, and 

 extending along the valley of the Aire, varying in breadth from one to three miles, 

 until it becomes continuous with a similar deposit in the valley of the Calder. 

 Pursuing the course of the Aire further towards the sea, we find the plain which the 

 river traverses becoming wider, and at length continuous with the flat district of th^ 

 lower part of the Ouse, and of the Trent, and of the other tributaries of tha 

 Humber. 



At Leeds this flat valley formation rests upon the outbreak of the coal measures. 

 It consists of clay, sand, and gravel, irregularly deposited under the varied in- 

 fluence of currents and eddies, and forming in the neighbourhood of Leeds a deposit 

 averaging from 10 to 20 feet in thickness. The gravel is chiefly formed of millstone- 

 grit and other sandstones, with occasional portions of mountain limestone, from th» 

 strata traversed by the river in the upper part of its course. 



Along with the remains of Hippopotamus have been found in this valley deposit, the 

 bones of the Elephant, of two bovine animals, apparently the Bos latifrons and 



4* 



