STUDIES 



OK THK 



DEVELOPMENT AND LARVAL FORMS 



OF 



ECHINODERMS 



BY 



Dr. TH. MORTENSEN 



WITH 33 PLATKS AM) 102 FIGURES IN THE TEXT 



PUBLISHED AT THE EXPENSE OF THE 

 CARLSBEHG FUND 



G. E.G. GAD COPENHAGEN 

 1921 









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