Tol. 50.] ANNIVERSARY ADDRESS OF THE PRESIDENT. 7 1 



Royal Institution, where he commented on the accuracy of Godwin- 

 Austen's views as to the range of the Coal-measures along the line 

 of the North Downs. It might not, perhaps, be an unmixed ad- 

 vantage to bring more coal to London than finds its way there 

 already ; but if something in the nature of a coal-basin exists 

 within hail of the metropolis, it is quite as likely to be found 

 between Croydon and Reigate as anywhere else. If the Board of 

 Trade could be persuaded to bore at suitable intervals along a line 

 connecting those two towns, geological science would certainly be 

 a gainer, and Surrey as well as Kent might be proved to have its 

 coal-field. 



Carboniferous Limestone. — There are no stratigraphical papers 

 dealing with this formation, but we have a series of palaeontological 

 papers by Miss Donald ; whilst Mr. Wethered gives us the results 

 of the examination of the insoluble residues obtained from the 

 Carboniferous Limestone of Clifton. 



In her first paper Miss Donald discusses the genetic relations of 

 the shells hitherto grouped under Murchisonia, more especially in 

 connexion with the sinuated genus Pleurotomaria, and the pos- 

 sibly, in some cases, sinuated Turritella. The second paper is mainly 

 occupied in discussing some of the genera or sections into which 

 Murchisonia has been broken up, with more especial reference to 

 Goniostroplia. In the third paper the Author goes a step further 

 by founding the section Hypertonia, to include such forms as Mur- 

 chisonia quadricarinata, and other well-known species, where the 

 sinus is situated above the angle. In this paper she likewise notes 

 the sections Ccelocaulus and Cerithioicles, giving a full description 

 with figures of Cerithioicles telescopium, a fossil so named by 

 Haughton under the impression that it was a Pyramidellid, closely 

 related to the recent Cerithium telescopium. Miss Donald proposes 

 to retain the name Cerithioicles for a section of Murchisonia, in 

 which this species might be placed until more is known of its 

 affinities. 



Beyond the fact that it relates to the Carboniferous Limestone, 

 Mr. Wethered's paper covers entirely different ground. Incidentally 

 the Author classifies the series at Clifton, which has a thickness 

 of 2700 feet, for purposes of reference, but it is the microscopic 

 examination of the insoluble residues and of rock-sections to which 

 I must direct attention. Rocks with from 1 to 80 per cent, of 

 matter insoluble in hydrochloric acid were examined, the impurities 

 consisting mainly of detrital quartz, with here and there a few 



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