ADVERTISEMENT. 
HE following sheets make up the First Fasciculus of Professor M°Coy’s Descriptive Cata- 
logue of the British Paleozoic Fossils that have been placed by myself in the Woodwardian 
Museum. It is devoted to the Radiata and Articulata; and a second Part (to be published, 
I trust, before the expiration of this year) will complete the series, and give a correspond- 
ing list of the Paleeozoic Mollusca and Vertebrata. The entire Catalogue will extend to 
about five hundred pages, and will be followed by about twenty-three plates, eleven of 
which appear with the present Fasciculus. 
Those species only are figured which are either new, or exhibit some character that 
has not been brought out in the figures published in previous works. All the drawings 
have been made in the Museum, with great care and labour, by Mr G. West, under Pro- 
fessor M*Coy’s immediate direction (with the exception of Pl. 1. G.) and will, I trust, be of 
value to paleontologists, and especially to those academic students who have a daily opportu- 
nity of examining the collection in the Cambridge Museum.* 
I can claim no merit from the Part now published, except that of having brought the 
collection together, and given it a permanent academic place, and of having for nearly 
four years secured the very valuable assistance of Professor M°Coy. But the work, when 
complete, will contain a Preface, in which I shall endeavour to give a short history of the 
manner in which the collection has been formed; partly by my own labours—continued, 
with some interruptions, for more than thirty years—and partly by the assistance of my 
friends and fellow-students. 
The Preface will end with a synopsis of the different natural groups into which the 
whole British Palzeozoic series may be separated—both on the evidence of actual sections, 
and on the Paleontological evidence supplied by the Catalogue. I may so far anticipate 
the result as to state, that the natural groups will be described in the following order :— 
* Mr J. W. Salter’s descriptions of several fossils in this work have been already printed; and will appear with 
the second Fasciculus in the form of an Appendix, as they contain references to a Plate not yet prepared for the engraver. 
