PLATE 94. 



Hyalonema (Oonema) crassipinulum Lendenfeld. 

 Figures 1-33. 



1-4. — Small macramphidiscs; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6: 

 1-3, broad ones; 

 4, a narrow one. 



5-11. — Micramphidiscs; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 

 12, 13. — A micramphidisc; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. oc. 6: 



12, focussed higher (on tlie uppermost teeth); 



13, focussed lower (on the shaft). 



14-23. — Acanthophores from the Palythoa attached to the stalk; magnified 200; phot. Zeiss, apochr. 

 8, compens. oc. 6. 



24-33. — Acanthophores from the sponge-body; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 



Hyalonema (Oonema) densum Lendenfeld. 

 Figures 34-42. 



34-36. — Acanthophores; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 



37-39. — Two whole microhexactines and part of one; magnified 200; phot. Zeiss, apochr. 8, compens. 

 oc. 6. 



40. — Part of a microhexactine; magnified 500; phot. Zeiss, H. I. apoclir. 2, compens. oc. 6. 



41, 42. — Radial sections through the choanosome; magenta: 



41, magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6; 



42, magnified 30; phot. Zeiss, planar 20 mm. 



