HEXACTINELLIDA. 



PLATE 53. 



Fig. 1—29 Hyalonema (Fhialoiiema) paierifernm Wilson. 1—14, 16, 21—29 form D; 15, 17—19 form F ; 20 form C. 



Lendenfeld photographed. 



Phototype by Charles BcHinann, I^rajjue. 



