THE DANISH INGOLF-EXPEDITION. 



VOLUME IV. 

 1. 



ECHINOIDEA. 



(PART I.) 



BY 



TH. MORTENSEN. 



WITH 21 PLATES AND 12 FIGURES IX THE TEXT. 



TRANSLATED BY TORBEN LUNDBE'CK. 



COPENHAGEN. 



PRINTED BY BIANCO LTNO. 

 1903. 



