THE DANISH INGOLF-EXPEDITION. 



VOLUME IV. 

 1. 



ECHINOIDEA. 



(PART I.) 



BY 



TH. MORTENSEN. 



WITH 21 PLATE.S AND 12 FIGURES IN THE TEXT. 



TRANSLATED BY .TORBEN LUNDBECK. 



^4»r::*<^-<- 



COPENHAGEN. 



PRINTED BY BLANCO LUNO. 

 1903. 



