. A ON ade 8 a inl Fe 
i é 
PLATE 71. 
Hyalonema (Prionema) pinulifusum LENDENFELD. 
Figures 1-11. 
1-3.— A microhexactine; magnified 500; phot. Zeiss. H. I. apochr. 2, compens. oc. 6: 
1, focussed high (on the tips of the three upwardly directed rays); 2, focussed intermediate 
centre of the spicule); 3, focussed low (on the tips of the three downwardly directed ra: 
4.— Part of a microhexactine; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 
5-8.— Macramphidises and parts of such; magnified 500; phot. Zeiss, apochr. 4, compens. oc. 
5, a whole one; 
6, 7, the centrum and one anchor of two others; 
8, a tooth seen nearly en face. 
9.— Group of microhexactines from a spicule-preparation ; magnified 200; phot. Teles ‘ape ock 
compens. oc. 6. 
10.—A micropentactine; magnified 200; ppbek: Zeiss, erodes 8, compens. oc. 6. 
