BIHANG TILL K. SVENSKA VET. AKAD. HANDLINGAR Band 5. N:o 19. 
PRELIMINARY REPORT 
ON THE 
HOLOTHURIDAE 
OF THE EXPLORING VOYAGE OF H. M. S. »CHALLENGER>, 
UNDER : PROFESSOR SIR (. WYVILLE THOMSON F. RB. s. 
BY 
 HJALMAR THÉEL. 
PLACRUIg 
COMMUNICATED TO THE R. SWEDISH ACAD. OF SCIENCES 1879 JUNE 11. 
PUBLISHED BY PERMISSION OF THE LORDS COMMISSIONERS OF THE TREASURY. 
STOCKHOLM, 1879. 
KONGL. BOKTRYCKERIET. 
P. A. NORSTEDT & SÖNER. 
