220 SUPPLEMENT TO THE 



SCOTTISH SILURIitN BRACHIOPODA. 



It has always been my desire throughout the preparation of the work ' On British 

 Fossil Brachiopoda ' to do all the justice within my power to the species of this class that 

 occur in the fossiliferous rocks of Scotland ; consequently from the very beginning until 

 the end my endeavours have never relaxed, and no trouble has been spared, in the search 

 for and study of all obtainable material.^ 



At the commencement of my researches only a small number of Scottish Brachiopoda 

 had been discovered and described, but as the work proceeded I was zealously assisted in 

 the search for specimens by many kind and well-wishing Scottish geologists, among 

 whom I would name Sir R. Murchison, Mr. Hugh Miller, Dr. Fleming, Dr. D. R. 

 Rankin, of Carluke, Prof. H. A. Nicholson, Dr. J. Young, Dr. D. Bryce, Dr. R. S. 

 Hunter, Mrs. R. Gray, Prof. A. Geikie, Prof. D. Page, Prof. C. Lapworth, Prof. J. Nicol, 

 Mr. J. Young, of the Hunterian Museum, Glasgow, Mr. J. Armstrong, Mr. J. Thomson, 

 Mr. J. Neilson, of Glasgow, Mr. R. Craig, of Beith, Mr. J. Smith, of Kilwinning, Mr. 

 R. SHmon, of Lesmahago, Mr. J. C. Moore, Mr. G. Binney, Mr. A. Somervail, Mr. J. 

 Henderson, Mr. G. C. Haswell, Mr. D. J. Brown, and Mr. C. W. Peach, of Edinburgh, 

 Mr. Alex. Robertson, of Elgin, Mr. D. Robertson, of Glasgow, Rear- Admiral E. J, Bedford^ 

 R.N. ; to all of these I am also indebted for much valuable information. I have like- 

 wise received important help from Prof. J. W. Judd, Mr. J. ^Y. Salter, Mr. J. W. Kirkby, 

 Mr. R. Etheridge, jun., and Dr. J. Gvvyn Jeffreys, who had also devoted attention to Scottish 

 recent and fossil forms. To all I would once again tender my grateful acknowledgments. 



From all the Scotch materials that have passed through my hands for examination 

 during the last thirty-three years, I have been able to determine, describe, and illustrate 

 some 4 recent species, 2 Post-Tertiar?/, 17 Liassic and Oolitic, 59 Carboniferous, and 

 about 134 Silurian, making a grand total of some 216 so-termed species. This is a 

 large number from a country that had been so long considered as scarcely fossiliferous 

 in this respect. And when it is borne in mind that it is only from the Jurassic, 

 Carboniferous, and Silurian formations that Scottish Brachiopoda have been obtained, the 

 number of species is certainly remarkable.^ 



1 In 1835, or nearly forty-eight years ago, I began to collect Scottish Brachiopoda in the County of 

 Midlothian, while assisting my friend Mr. E. J. Cunningham in the preparation of his Essay on the 

 ' Geology of the Lothians.' 



" We have, it is true, Tertiary, Cretaceous, and Devonian rocks in sitH in Scotland, but none of these 

 formations, otherwise fossiliferous, there have hitherto afforded us a single species of Brachiopoda. The 



