THE DANISH INGOLF-EXPEDITION, 



VOLUME IV. 



2. 



ECHINOIDEA. 



(PART II.) 



BY 



TH. MORTENSEN. 



WITH 19 PLATES AND 27 FIGURES IN THE TEXT. 



■5 /' 



\\^ 



COPENHAGEN. 



PRINTED BY BIANCO LUNO. 

 1907. 



^.- 



