British Association for the Advancement of Science. 127 



Dr. Buckland announced that the Fossil Flora of Great 

 Britain was about to be continued by Messrs. Hutton and Hens- 

 low. — Dr. Lloyd mentioned the recent discovery of Saurian re- 

 mains in Warwickshire. — Dr. Ward exhibited specimens and 

 drawings illustrative of impressions of the feet of animals on the 

 Greensill sandstone, near Shrewsbury. Greensill hill consists of 

 a steep escarpment of new red sandstone, and contains four strata 

 that have been described by Mr. Murchison, and in the second of 

 which the impressions were found. This stratum when exposed 

 to the atmosphere, always splits so as to exhibit ripple marks, and 

 on these marks the impressions of feet have been observed, as well 

 as marks of drops of rain. The latter are often in an oblique direc- 

 tion, as if having fallen in a gale of wind, the direction of which 

 is thus pointed out. The foot-marks differ from those of the 

 Cheirotherium, in having only three toes, armed with long nails, 

 directed forwards, and not spread out. Nothing resembling the 

 ball of the foot has been observed, except in a few, which have 

 some resemblance to the impression of the foot of a dog. 



Mr. Knipe read a communication on a trap dyke in Cumberland. 

 Its length is 22 miles and its width from 20 to 30 yards. Its 

 course coincides with that of the great Cleveland Dyke, and it is 

 not improbable that they may be connected ; if so, a basaltic dyke, 

 120 miles long, crosses our island from the Solway Firth to the 

 German Ocean. 



Mr, Darwin announced that a work on fossil teeth by Prof, 

 Owen, will shortly be published, 



A communication on Peat-hogs, by Dr. G. H, Adams, was 

 read. The author had examined microscopically many speci- 

 mens of peat, and had found them to consist of bundles of little 

 capsules, somewhat like bunches of raisins, attached to the radi- 

 cles of the plants growing on the surface of the bogs. — Mr. J. B. 

 Yates read a paper on the Changes and improvemetits in the 

 embouchure of the Mersey. — A paper was received from Mr. R. 

 Garner on the use of millstone grit in the rnanufacture of ivhite 

 earthen-ware. Millstone grit has been used in Staffordshire for 

 three or four years, being ground instead of flint, which is more 

 expensive, as it must be calcined before grinding. The ware 

 thus produced is as white, compact and durable, as that made by 

 the former process. 



