REPORT OF THE SECOND NORWEGIAN ARCTIC EXPEDITION 

 IN THE "FRAM" 1898—1902. No, 12. 



HJALMAR BROCH: 



HYDROIDEN UND MEDUSEN 



(MIT 2 TAFELN) 



AT THE EXPENCE OF THE FRIDTJOF NANSEN 

 FUND FOR THE ADVANCEMENT OF SCIENCE 



ftiBLtSHfiD BY 



VIDENSKABS-SELSKABET I KRISTIANIA 



-oco- 



KRISTIANIA 

 PRINTED BY A. W. BR0GGER 



1907 



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