KUNGL. SVENSKA VETENSKAPSAKADEMIENS HANDLINGAR. Band 49. N:o 4. 



SOME NOTES ON THE DEVELOPMENT 



OF 



ECHINOCARDIUM CORDATUM (penn.) 



AND 



PARECHINUS MILIARIS (D 



BY 



HJALMAR THÉEL 



WITH ONE PLATE AND THREE ILLUSTRATIONS IN THE TEXT 



UPPSALA & STOCKHOLM 



ALMQVIST & WIKSELLS BOKTRYCKERI-A. -B. 



1912 



