422 Notices and Extracts from the Minutes of the Geological Society, 



vember last (1822) one of large dimensions was discovered. It was consider- 

 ably curved, and measured 9§ feet along its curvature ; the workmen unfor- 

 tunately destroyed the middle portion in attempting to extract it from the dilu- 

 vium: the two ends are, through thekindnessof W.Aveline,Esq.of Lyme,now 

 in my possession. The fragment containing the thickest extremity measures 

 3 feet 3 inches in length, and 1 foot Q^ inches in circumference at b«th ends. 

 It preserved therefore the same thickness for that distance. It has a small ca- 

 vity penetrating about 4 inches at its lower extremity. The other fragment 

 contains the apex, and measures I foot 1| inch in circumference, at 1 foot 

 5 inches from the point. 



About 2 years since, another elephant's tusk of much smaller dimensions 

 was found near the same spot. Like the larger specimen, it is much curved ; 

 it measures 3 feet 6^ inches along its curvature, and ] 1^ inches in circumfe- 

 rence at the thick end : this is also in my possession*. Three molar teeth of 

 a fossil rhinoceros, and fragments of a large tusk of an elephant, have been 

 found in a similar diluvium above the Church cliffs at Lyme. 



6. — On the Substances contained in the Interior of Chalk Flints. By the 

 Rev. J. J. Conybeare, m.g.s. [Read June 7th, 1822.] 



In searching the chalk-pits of Broughton near Salisbury for organic remains, 

 my attention was attracted by the frequent occurrence of flinty nodules, appa- 

 rently moulded on alcyonia, the cavities of which, on breaking them, in lieu of 

 the expected fossil, afforded only a white powder having the general aspect of 

 a crumbly chalk, but feeling somewhat more gritty to the touch. In many 

 cases these nodules had, as is usual with alcyonic flints, one or more traces of 

 apertures. In others, no such trace was perceptible. The contents of one of 

 these latter were carried home, and gave, on a rough analysis. 



Carbonate of lime slightly tinged by iron .... 72 

 Silex in the state of a fine sand 28 



100 



The siliceous sand appeared under a tolerable microscope to consist of angu- 

 lar rather than rounded particles ; but its pureness was such as to render this 

 point scarcely determinable without the aid of a higher magnifying power than 



* Professor Buckland informs me, that about 15 years ago another small tusk, nearly of the 

 same size, was found in the sand at the base of this same cliff, from which it clearly must have 

 fallen, and was placed in the collection of H. H. Henley, Esq., of Sandringham, Norfolk. 



