THE DANISH INGOLF-EXPEDITION. 



VOLUME V. 



6. 



HYDROIDA 



(PART I.) 



BY 



HJALMAR BROCH. 



WITH 2 PLATES AND 20 FIGURES IN THE TEXT. 



■>-^»;:?<f<- 



COPENHAC.fciN. 



PRINTED BY BIANCO LUNO. 

 I916. 



