600 Meeting of ilie British Association. [Oct., 



Mr. James Thomson's paper " On the Teeth and Dermal 

 Structure of Ctenacanthus and on New Forms of Pteroplax and 

 other Carboniferous Labyrinthodonts, and of Megalichthys," wa3 

 intended to prove that several so-called genera founded upon fossil 

 fishes' teeth, were in reality only dermal spines. Mr. Thomson 

 also showed that three or four existing genera could now be united 

 in one. He exhibited a fine suite of Labyrinthodont and fish-remains, 

 which he stated Professor Dr. Young would shortly describe. 



Mr. W. Carruthers called attention to the occurrence of Eep- 

 tilian eggs in the Stonesfield slate and in the Greensand of the Isle 

 of Wight, They were forwarded to him as fossil fruits, and had a 

 pecuharly glossy appearance, and the test was very thin. 



Mr. Henry Woodward noticed (1) the occurrence of a new 

 form of Stylonurus from the Cornstones of Herefordshii'e, and (2) 

 the discovery of a large Myriapod {Euphoheria Brownii) in the 

 Coal-measures of Kilmaurs, near Glasgow. 



Mr. J. Eandall's paper " On the Denudation of the Shropshire 

 and Stafibrdshire Coal-fields," treated of the mineral character of 

 some of the coal-seams, and also showed how several of them had 

 been cut off by denudation. The author believed these fields were 

 once continuous, but that they had been separated by denudation. 



Dr. C. Le Neve Foster communicated a note on the occurrence 

 of the mineral Scheelite at Val Toppa Gold Mine, near Domodos- 

 sola. Piedmont. It is found associated with quartz, iron-pyrites, 

 zinc-bleude, calc-spar, brown-spar, and native gold. Scheehte (or 

 tungstate of lime) is called " marmor-rosso " in Piedmont, and is 

 looked upon as a good indication of the presence of gold. 



Mr. John E. Taylor noticed certain phenomena in the Drift 

 near Norwich. The contorted, furrowed, and disj^laced condition 

 of the Boulder-clay and Drift beds, and the fractured and dislocated 

 appearance of the Chalk along these hues of disturbance, could 

 best, Mr. Taylor suggested, be explained by the action of icebergs. 



A paper " On the Water-bearing Strata in the Neighbourhood 

 of Norwich," by the same author, followed. It dealt with the 

 origin of " sand-pipes " in the Chalk, and their action as natural 

 drains, and the author gave an interesting statement of the efiect 

 of steam-power pumping in lowering the level of the wells around. 



Mr. G. A. Lebour offered some Notes on the Denudation of 

 Western Brittany, and on the Granites of Lower Brittany. 



Dr. H. A. Nicholson contributed an account of some new forms 

 of Graptolites fi'om the Lower Silurian series. 



Mr. Charles Moore's " Eeport on the Investigation of Veins con- 

 taining Organic liemaius which occur in the Mountain Limestone 



