388 Geological Society. 



a fauna quite distinct from and older than that which was indicated 

 by Mastodon arvernensis. 



(5) List of Mammalian Fossils of the Suffolk Bone-bed, with refer- 

 ence to Collections containing them, and Number of Specimens. — The 

 object of this list,was to furnish an idea of the actual and relative 

 abundance of the various mammalia, and to afford those interested 

 in the matter information as to the much-scattered materials in 

 private collections. 



2. " Notes on an Ancient Boulder- clay of Natal." By Dr. 

 Sutherland, Surveyor-General of the Colony. 



The author described the extensive occurrence in Natal of a 

 formation which he considered to present the essential characters of 

 Mr. Bain's " claystone porphyry." It consisted^ of a greyish-blue 

 argillaceous matrix, containing fragments of Granite, Gneiss, Green- 

 stone, Clayslate, &c, often of large size, exhibited ripple-markings 

 in some places, and in others showed a rude approach to wavy stra- 

 tification. It rested generally upon Old Silurian Sandstones, the 

 upper surface of which was often deeply grooved and striated. The 

 author regarded this deposit as an ancient Boulder-clay, perhaps of 

 Permian age. 



3. " On the Distribution of Wastdale-Crag Blocks, or ' Shap-Pell 

 Granite Boulders,' in Westmoreland." By Prof. Bobert Harkness, 

 P.E.S., P.G.S. 



The author described the position of Wastdale Crag and the 

 general distribution of the blocks of granite derived from it, and 

 discussed the hypotheses which have been proposed to account for 

 this distribution, and especially to explain how the blocks could 

 have been transported to the eastern side of the elevated ground of 

 Stainmoor. The author considered that neither of the extant hypo- 

 theses, accounting for the transport of these blocks by the agency of 

 a glacier or of icebergs, was tenable ; and he indicated what he re- 

 garded as the chief objections to each of them. He suggested that 

 their transport had been effected by the agency of coast-ice, the land 

 being depressed to the extent of about 1500 feet, which would 

 leave the Wastdale Crag sufficiently exposed to atmospheric action 

 to enable it to furnish the blocks; the icefloes, serving as rafts, 

 would suffice to convey the blocks to other parts of the coast, whilst 

 they would not require any great depth of water to float them. 



