^Vfe^v^— ^ JzU^^ ^^^ ^^ 



KONGL. SVENSKA VETENSKAPS-AKADEMIENS HANDLINGAR, Bandet 19. N:o 7 





ON 



POURTALESIA 



A GENUS OF ECIIINOIDEA 



SVEN LOVEN. 



WITH TWF.NTY ONE PLATES. 



COJlMIINICATr n TO niK H. SWFniSII .ACATirMY OF SCIENCrS JUNE 11 187'J AND JUNK 7 1883 



. STOCKHOLM, 188S. 



KONGL. nOKTUYCKERIF.T, 



r. A. XOKSTRDT & SfiXKn. 



