a 
PLATE 70. 
Hyalonema (Hyalonema) tylostylum LENDENFELD. 
Figures 1-10. 
1, 2.— Dermal pinules; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 
3.— Part of a radial section through the superficial part of the sponge and the pinule-fur; magnified 100; 
phot. Zeiss, apochr. 16, compens. oc. 6: 
a, a large macramphidise; b, dermal pinules. 
4.— A microhexactine; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 
5.— Group of spicules in a centrifuge spicule-preparation; magnified 200; phot. Zeiss, apochr. 8, com- 
pens. oc. 6: 
a, microhexactines; b, a micropentactine; ¢, a micramphidisc. 
6.— View of the smaller specimen; reduced 100: 91; phot. Zeiss, anastig. 480/412 mm. 
7.— A microhexactine; magnified 200; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 
8.— Surface view of the dermal pinule-fur; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 
9, 10.— Gastral pinules; magnified 300: 
9, phot. Zeiss, apochr. 8, compens. oc. 12; 
10, phot. Zeiss, apochr. 4, compens. oc. 6. 
Hyalonema (Prionema) pinulifusum LENDENFELD. 
Figures 11-24. 
11-24.— Pinules; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6: 
11-14, small, probably canalaria; 
15-19, large; 
20-24, medium. 
