EXPLANATION OF PLATE XLVI. 



Fig. 1. — Sertularella undulata, sp. no v. 

 Fig. 2. — Sertularella tasmanica, sp. no v. 

 Fig. 3. — Sertularia pusilla, nom. nov. 



Fig. 5.— 

 JTiff 6 — 



Figs. 1-6x40. 



