ON THE DEVELOPMENT 



OF 



ECHINOCYAMUS PUSILLÜ8 



(0. R MtJLLER) 



BY 



HJALMAR THÉEL. 



WITH NINE PLATES. 



(Presented to the Eoyal Society of Sciences of Upsala February 12 1892). 



UPSALA. 



PRINTED By EDV. BEKLISG. 

 18 92. 



