HEXACTINELLIDA. 



PLATE 50. 



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Fig. 1 — 5 Hyalonema (Prionema) spinosum n. sp. 

 Fig. 6 — 15 Hyaloncvia (Phiahnema) pateriferum Wilson form E. 



Lendenfeld photographed. 



Phototype by Charles Bellmann, Prague. 



