94 CARBONIFEEOUS CORALS AND BRACHIOPODS 
and, where no figure exactly fits the specimen, I have 
pointed out the most important directions of deviation ; 
I have also made constant reference to the works of de 
Koninck (especially to the Carboniferous Fauna of Belgium, 
the Monographs on the Genera Productus and Chonetes, 
and to a later paper on Spirifer Mosquensis and its allies) » 
McCoy’s Paleozoic Fossils has been of very great service 
in both the Brachiopods and the Corals. 
In the examination of the Corals I have chiefly relied 
upon the works of Edwards and Hairne (the Palaeozoic Corals 
and the Monograph of British Fossil Corals), but I have also 
made considerable use of McCoy’s work and of the numerous 
papers by James Thomson in the Proceedings of the 
Philosophical Society of Glasgov/. 
It is with great pleasure that I seize this opportunity 
of acknowledging my great indebtedness to Prof. S. H. 
Reynolds, M.A., F.G.S. ; Mr. J. F. Walker, M.A., F.G.S., etc.; 
Dr. Wheelton Hind, M.A., F.G.S., etc. ; Mr. F. W. Stoddart, 
F.I.C., F.C.S. ; Mr. J. W. Tutcher and Mr. T. F. Sibly, B.Sc., 
for the great assistance they have so unselfishly and un- 
grudgingly given me during my work at the collection. 
To Mr. J. W. Tutcher I am under a very deep obligation 
for the splendid photographs of which the plates are 
somewhat unsatisfactory reproductions. 
To Mr. F. W. Stoddart I offer my sincerest thanks for 
the trouble ho has taken in unearthing the manuscript 
note-books of the late Mr. W. W. Stoddart ; these notes 
have enabled me to accurately fix the horizons of several 
of the forms and also to explain several apparent discre- 
pancies between the positions in which I have found certain 
fossils and those to which they are referred in the collection. 
