THE DANISH INGOLF-EXPEDITION. 



VOLUME IV. 



1. 



ECHINOIDEA. 



(PART I.) 



BY 



TH. MORTENSEN. 



WITH 21 PLATES AND 12 FIGURES IN THE TEXT. 



TRANSLATED BY TORBEN LUNDBECK. 



S£P O 9 »86 



->4»»2:<<f<- 



COPENHAGEN. 



PRINTED BY BIANCO LUNO. 

 1903- ■, 



