PREFACE. 
This work was originally designed to form one of a series of ‘ Lists of Types 
and Figured Specimens,’ similar to that issued last year for the Fossil 
Cephalopoda. But since Mr. Bather found the compilation of a complete 
list of species and of specimens in the Collection to be a necessary aid to 
his curatorial duties, it was thought that such an Index might prove 
useful to workers in this group in other Museums. 
The restricted range of the Blastoidea has rendered it possible to 
condense the list into limits suitable for publication, and its alphabetical 
form renders it very convenient for reference. 
Geological Department, 
British Museum (Natural History), 
Cromwell Road, S.W. 
March 30th, 1899. 
HENRY WOODWARD. 
