574 PEOCEEDrNGS OP THE GEOLOGICAL SOCIETY. 



Eed Sandstone*; and Prof. Phillips f would not confidently place 

 them in a definite position in consequence of the resemblance of 

 their fossils to many of the species occurring in the Mountain-lime- 

 stone. The labours of other authors are commented upon in this 

 paper, and comparisons are made with other systems J. 



1841. Phillips. — "Figures and Descriptions of the Palaeozoic 

 Possils of Cornwall, Devon, and West Somerset." § This volume 

 accompanies Sir H. De la Beche's Eeport, and contains accurate 

 descriptions and figures of alL the species of Devonian fossils then 

 known ; and when we consider the fragmentary nature and unsatis- 

 factory condition of the fossils that occur in these slates and lime- 

 stones, and the materials out of which Professor Phillips compiled 

 his work, it is one of the highest classical value, which we must ever 

 apply as our standard of reference. The divisions and sequence 

 therein adopted require little or no change at my hands, and have 

 been fully confirmed by recent investigations. 



1842. Sedgwick and Murchison \\ . — "On the Distribution and 

 Classification of the Older or Palaeozoic Eocks of North Germany and 

 Belgium, &c." ; accompanied by a description of the Possil Mollusca, 

 &c., by Viscount d'Archiac and M. E. de Yerneuil. The Carboni- 

 ferous rocks of Westphalia, as well as the Devonian limestones and 

 shales of Mettmann, Elberfeldt, Hagen, and Iserlohn, and the calca- 

 ceous rocks of Pfafirath, Eefrath, &c., on the right bank of the 

 Ehine, are elaborately described in the first part of this paper. The 

 second part contains an explanation of the structure of the country 

 on the left bank of that river, comprising the rocks of the Eifel and the 

 older rocks of the Moselle and the Ehine, with the formation of the 

 Hundsriick and the Taunus. Part the third embraces descriptions of 

 the Devonian rocks which constitute the Thiiringerwald, Upper Eran- 

 conia, and the Eichtelgebirge, and descriptions of Hof, Elbersreuth 

 and Gerolsgriin, &c. 



In this important memoir the authors with much detail describe, 

 the whole of the Devonian deposits, occupying a large portion of the 

 Ehenish province and Belgium. It is followed by a long and im- 

 portant memoir by Yiscount d'Archiac and M. Edouard de Yerneuil 

 descriptive of the organic remains which occur in the rock-masses, 

 commencing with a general survey of the fauna of the Palaeozoic 

 rocks known at that date. Pp. 336-410 are occupied by carefully 

 detailed descriptions and notices relative to the species and their 

 distribution through the Lower, Middle, and Upper divisions of the 

 Devonian rocks ; and the paper is concluded by a table showing the 

 ranges, and giving other important information relating to the 

 British and Ehenish fossils. 



* Trans. Plymouth Instit. pp. 36-43, 1828, 1830. 



t Encyclop. Metropolitana, 1836. 



J This paper by Mr. Lonsdale contains a complete list of authors and their 

 opinions, extending from the time of Woodward in 1729 to those of Sedgwick 

 and Murchison in 1839. 



§ Published by order of the Lords Commissioners of Her Majesty's Treasury. 



il Geol. Trans. 2nd series, vol. vi. 1842. (Paper read May 13th and 27th, 1840.) 



