PLATE 102. 



Hyalonema (Skianema) umbraculum Lendenfeld. 

 Figures 1-8. 



1, 2. — Apical view of a large macramphidisc; magnified 500; phot. Zeiss, apochr. 8, compens. oc. 



1, focussed higher; 2, focussed lower. 

 3-6. — ^ Small macramphidiscs; magnified 500; phot. Zeiss, apochr. 8, compens. oc. 12: 



3, 5, focussed high (on the uppermost teeth); 4, 6, focussed lower (on the shaft) (3 = 4; 5 = 

 7, 8. — A large macramphidisc; magnified 500; phot. Zeiss, apochr. 8, compens. oc. 12: 



7, focussed high (on the uppermost teeth); 8, focussed lower (on the shaft). 



