Vlll INTRODUCTION. 



assistance from Dr. Danielssen of Bergen, Dr. Sturm of Trondbjem- 

 fjord, and Prof. Quennerstedt of Lund. In these inquiries, as in so 

 many of which Echinoderms have been the subject, I owe a special 

 debt of gratitude to my venerable friend Prof. Loven for advice, 

 assistance, and the gift or loan of numerous specimens. 



The names of donors of specimens are in all cases given ; when 

 the column is left blank it is to be understood that the specimens 

 were acquired by purchase. 



F. JEFFREY BELL. 



British Museum (N. H.) ( 

 8th November, 1892. 



