PLATE 20. 
Holascus edwardsii LENDENFELD. 
Figures 1-20. 
1, 2.— Large choanosomal pentactines; magnified 2.3; phot. Zeiss, anastig. 167 mm. 
3.— Inner surface of the body-wall of a specimen cut in half longitudinally; reduced 1: 6.5; phot. . 
Zeiss, anastig. 480/412 mm. 
4.— View of a specimen (outer surface of the body-wall); reduced 1: 6.5: phot. Zeiss, anastig. 480/412 
mm. 
5-10.— The distal end-part of anchoring spicules; magnified 600; phot. Zeiss, apochr. 4, compens. oc. 12: 
a (in figs. 5-8), axial cross. 
11-15.— Different parts of one and the same anchoring spicule; magnified 200; phot. Zeiss, apochr. 8, 
compens. oc. 6: 
11, portion of the proximal smooth part; 
12-14, successive portions of the spined distal part; 
15, the distal end-part with its anchor. : 
16-20.— The distal end-part of anchoring spicules; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
“5 
. 
| 
z= i, Ole x “a ne i>. (ee 
