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PLATE 90. 
Hyalonema (Oonema) sequoia LmNDENFELD 
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_ Figures 1-10. 
1-10.— Small macramphidises; magnified 500; phot. Zeiss, apochr. 8, compens. oc. 190 
1, 3, 5, 7, 9, focussed high (the upper teeth in focus) ; 
2, 4, 6, 8, 10, the same spicules focussed low (the shaft i 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. 
