PLATE 59. 



Hyalonema (Prionema) fimbriatum Lendenfeld. 

 Figures 1-6. 



1-3. — Three macramphidiscs with the shaft in focus; magnified 500; phot. Zeiss, apochr. 8, compens. 

 oc. 6. 



4-6. — Three anchor-heads of macramphidiscs, with the uppermost teeth in focus; magnified 500: 



4, an anchor with teeth terminating with two lobes; phot. Zeiss, apochr. 4, compens. oc. 12; 



5, an anchor with normal teeth; phot. Zeiss, apochr. 8, compens. oc. 6; 



6, an anchor with the ends of some of the teeth bent towards one side; phot. Zeiss, apochr. 8, com- 

 pens. oc. 6. 



(Figs. 5 and 6 represent the two anchors of the same amphidisc). 



