TO BE INSERTED 
in the Monograph of Austin H. Clark: "The Unstalked Crinoids of the Siboga Expedition", 
livr. LXXXIII, March 1918 of the Siboga publication as Plate IV; to replace the one which 
was lost in 191 7 on its voyage from Washington to Holland, while the Monograph was 
in preparation. 
MAX WKBER. 
PLATE IV. 
Heterometra affinis. Ventral view of 
a young specimen with fifteen arms from Stat. 9. Natural size. 
