IV PREFACE. 



for his kindness in looking over the sheets as they were passing 

 through the press and for suggesting many alterations and 

 improvements. The references given do not aim at a complete 

 synonymy, which would have been beyond the province of the 

 present Catalogue ; but a few names of papers and figures of 

 different osteological specimens have been quoted wherever they 

 have been deemed useful to the student. 



R. B. S. 



British Museum (Natural History), 

 November 13, 1891. 



