PLATE 90. 



Hyalonema (Oonema) sequoia Lendenfeld 

 Figures 1-10. 



1-10. — Small macramphidiscs; magnified 500; phot. Zeiss, apochr. S, compens. oc. 12' 



1, 3, 5, 7, 9, focussed high (the upper teeth in focus); 



2, 4, 6, 8, 10, the same spicules focussed low (the shaft in focus); 



1, 2, a small one; 



3, 4, a medium-sized slender one; 



5, 6, a medium-sized broad one with partly irregular anchor-teeth; 

 7, 8, a large one; 



9, 10, a medium-sized broad one with regular anchor-teeth. 



