TABLE OF CONTENTS. 



Thomas Davidson, Esq., F.R.S., Shg. G.S., &c. — Palseontologioal Notes on 



the Brachiopoda 457 



Rev. T. W. Norwood, Cheltenham. — The Comparative Geology of Hotham, 



near South Cave, Yorkshire 472 



Mr. Maek W. Norman. — Description of the Section of the Upper Greensand at 



the UnderclifF, in the Isle of Wight 480 



Dr. T. L. Phtpson. — Foreign Correspondence 485 



Reports of Geological Societies 491 



Notes and Queries - 493 



British Association Meeting 494 



AGEICULTUEAL AN^D CHEMICAL COLLEGE, 



38 and 39, Lower Kennington-lane, London. 

 Principal— J. C. NESBIT, F.G.S., F.C.S., &c. 

 In this Institution unusual facilities are afforded for acquiring a thotough 

 knowledge of agricultural, general, and analytical chemistry, and also of surveying 

 and mathematics. 



The terms for students, resident or non-resident, may be known on application. 

 Analyses and assays of every description are promptly and accurately executed at 

 the College. 



TO TOURISTS IN N'ORTH WALES.-— '' The Geological Structure of 

 Merionethshire and Carnarvonshire," by Professor A. Ramsay, F.R.S., and G.S. 

 Illustrated by a Panoramic Diagram, drawn from the summit of Cader Idris, by 

 Percy W, Hengill, Esq., C.E., reprinted, with additions, from the Geologist, Vol. I, 

 No. 5, 1858. Cloth Is 6d., stitched Is. 



London : Reynolds and Co., 15 Old Broad street ; Simpkin, Marshall, and Co., 

 Stationers' Hall court. 



DOUBLE REFEACTING SPAE.— Mr. Tennant, Geologist, 149 Strand, 

 has just received from Iceland some unusually large and fine specimens of this 

 interesting mineral. Mr. Tennant arranges Elementary Collections of Shells, 

 Minerals, Rocks, and Fossils, to illustrate Conchology, Mineralogy, and Geology. He 

 also gives Practical Instruction in Geology and Mineralogy. 



Just Published, price One Shilling. 



QN" THE EXTRACTION of the PRECIOUS METALS, by means of 



Mitchell's Patented Amalgamating Machinery. Also a description of the various 

 modes at 1 resent in use for the treatment of Auriferous and Argentiferous substances. 

 By .John Mitchell, F.C.S., Author of " Manual of Practical Assaying," " Metallurgical 

 Papers,'' &c. 



To be had of Percival Clay, 37 Old Broad Street, London, E.C. 



Just published, 8vo., 3s. 6d., sewed, 

 npHE GROUND BENEATH tJS : its Geological Phases and Changes. 



Being three lectures on the geology of Clapham and the neighbourhood of 

 London generally. By Joseph Prestwich, F.R.S., F.G.S., &c. John Van Voorst, 

 1 I'atcvnoster Row. 



TI>RO\ I]SCIAL INSTITUTIONS desirous of making arrangements for 

 the delivery, during the enduing season, of popular lectures on Geology, are 

 requested to communicate with the Editor of the Geologist during the present 

 monUi. ^ ^ 



