ihe] \ 
PLATE 30. 
Eurete erectum ScuHuuze. 
Figures 1-17. 
1-3.— Side-views of gastral pinules (pinule-derivates); magnified 200; phot. Zeiss, apochr. 8, compens. 
oc. 6. 
4.— The dermal face of the skeleton-net; magnified 6.6; phot. Zeiss, planar 50 mm. 
5.— The gastral face of the skeleton-net; magnified 2.1; phot. Zeiss, anastig. 167 mm. 
6.— The gastral face of the dictyonal skeleton-net; magnified 6.6; phot. Zeiss, planar 50 mm. 
7.— Transverse section through the dermal zone of the tube-wall; magnified 100; phot. Zeiss, apochr. 
16, compens. oc. 6: 
a, lateral rays of dermal pinules; c, flagellate chambers; d, distal ray of a dermal pinule; e, 
dermal spine of the skeleton-net; f, skeleton-net. 
8.— Apieal view of a gastral pinule-derivate; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
9.— Side-view of a gastral pinule; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
10.— Transverse section through the dermal zone of the tube-wall; methyl-violet; magnified 100; 
phot. Zeiss, apochr. 16, compens. oc. 6: 
a, lateral rays of dermal pinules; c, flagellate chambers; d, distal ray of dermal pinule; e, 
dermal spine of the skeleton-net; f, skeleton-net. 
11.— View of portion of the gastral face of the skeleton-net; magnified 20; phot. Zeiss, planar 20 mm. 
12.— Transverse section through the tube-wall; magnified 30; phot. Zeiss, planar 20 mm.: 
a, lateral rays of dermal pinules; b, lateral rays of gastral pinules; d, distal ray of dermal 
pinules; f, skeleton-net; g, gastral spines of the skeleton-net; h, distal rays of gastral see 
13, 14.— Apical views of eoetea pinules ((pinule-derivates); magnified 200; phot. Zeiss, apochr. 8, 
compens. oc. 6. 
15.— Transverse section through the gastral zone of the tube-wall; magenta; magnified 100; phot. 
Zeiss, apochr. 16, compens. oc. 6: 
b, lateral rays of gastral pmules; i, gastral scopules. 
16.— View of the sponge; magnified 1.2; phot. Zeiss, anastig. 480/412 mm. 
17.— Transverse section through the tube-wall; magenta; magnified 30; phot. Zeiss, planar 20 mm.; 
a, lateral rays of dermal pinules; b, lateral rays of gastral pinules; c¢, flagellate chambers; d, 
distal rays of dermal pinules; f, skeleton-net; g, gastral spines of the skeleton-net; h, distal 
rays of gastral pinules; i, gastral scopules. 
