PREFACE. 



During his work of arranging the Palaeontological 

 collections of the Museum, Mr. Bolton has noted the various 

 type fossils %s they presented themselves for consideration, 

 and lists of these have been forwarded to Mr. A. Smith 

 Woodward, the Secretary of the British Association 

 Committee, for their registration. 



When the meeting of the Museums' Association was about 

 to be held in Manchester in July, 1892, I suggested to Mr. 

 Bolton that a list of the types and figured specimens, as 

 complete as he could compile, would be an appropriate 

 communication to that Society. The present Catalogue is 

 the result of his labours in that direction. References 

 have been given to the more important papers treating of 

 the species under consideration, and in almost every case 

 these have been verified by consulting the original sources. 

 The descriptions of two forms — Cyclus Scotti and Myriolepis 

 Hihevnica — were drawn up for this Catalogue, but have been 

 published in the Geological Magazine whilst it was in the press. 

 The Museum is much indebted to Dr. H. Woodward, F.R.S., 

 and Dr. R. H. Traquair, F.R.S., for their kindness in com- 

 municating the respective descriptions and drawings. 



W. E. H. 



