4 BRITISH DEVONIAN BRACHIOPODA. 



Devon and Cornwall, in the ' Geologist,' vol. v, p. 10, &c., but that neither Professor 

 Sedgwick nor himself intend by this to express any opinion respecting the co-ordination of 

 these Devonian rocks with those of the Devonian system elsewhere. Mr. Pengelly would, 

 however, arrange the localities represented by the fossils he sent for my examination as 

 below, in descending order : — 



Barnstaple, Baggy, Tintagel 1 Transition or Devonian-Carboniferous Beds, 



Tintagel ?, Petherwin Upper Devonian of Devon and Cornwall, 



Lummaton, Woolborough, Ramsleigh?, Hope's") . . 



.... „ _ , „ T ^ . i. Middle Devonian of Devon and Cornwall, 



iNose f, Oalmpton or Warren Point J 



Looe, Meadfoot, Galmpton Creek, Black Hall,] Lower Devonian of Devon and Cornwall = Upper 



St. Veep, Polruan, Whitesand Bay J Old Red of Scotland, 



but that he would not be surprised to find the Hope's Nose beds belonging somewhat 

 higher; that Ramsleigh, though very near Woolborough, has little in common with it. It 

 certainly yields in great plenty the coral Acervularia pcntagona, which Murchison marks 

 a characteristic fossil in his " Middle Devonian," but, so far as he knows, this organism is 

 not found elsewhere in the district ; moreover, the Upper Silurian coral, Chonopltylhnn 

 perfoliatum, occurs at Ramsleigh but in no other Devonian locality, so the locality is rather 

 a puzzling one. 



Professor L. de Koninck considers that the Torquay beds correspond to the psam- 

 mites of the Rhine, while those of Newton would represent those of the Eifel. The 

 Devonian formation is therefore composed of a very remarkable series of deposits, 

 which have attracted much interest in this country as well as upon the Continent and in 

 America, and been the subject of many important researches and works by some of our 

 most able geologists and palaeontologists, among whom we may mention Sir H. Dc la 

 Beche, Sir R. Murchison, Sir C. Lyell, Professors Phillips, Sedgwick, M'Coy, Sclmur, 

 Hall, and Jukes ; Viscount d'Archiac and M. De Verneuil ; Drs. Sandberger, Messrs. 

 Godwin-Austen, Lonsdale, Pengelly, Weaver, Kelly, Sowerby, II. Miller, Salter, 

 Schlotheim, P. Roemer, Baron Von Buch, and others, whose labours and works will be 

 alluded to in the sequel. 



The material I have been able to examine in connection with this monograph has been 

 considerable, but has not always been so good in quality as in number of specimens ; and this 

 may be easily accounted for when Ave remember how many of our Devonshire and Cornwall 

 fossils have been contorted and put out of shape from the effects of cleavage and pressure, 

 and that a large proportion of the fossils are found in the state of imperfect internal casts, 

 or obscure fragments and impressions, at times completely undeterminable. It is in the 

 limestone of the Middle Devonian, especially from the neighbourhood of Newton Abbot, 

 Torquay, Plymouth, and some other localities, that our most perfect specimens have been 

 obtained ; and it is a most pleasing duty to again return thanks to Sir R. Murchison and 

 Professor Huxley for the use they have kindly enabled me to make of the valuable series of 

 specimens preserved in the Museum of the Geological Survey of Great Britain, and where 



