PLATE 68. 
Hyalonema (Hyalonema) tenuifusum LENDENFELD. 
Figs. 1, 3-10, 20, 22, 23, 25 — specimen b. 
Figs. 2, 11-19, 21, 24 — specimen a. 
1.— The end-part of an anchor-tooth of a large macramphidise of specimen b; magnified 2000; u. v. 
phot. Zeiss, q. monochr. 1.7, q. oc. 10. y 
2-4.— Gastral (and canalar ?) pinules; magnified 300: 
2, of specimen a; phot. Zeiss, apochr. 16, compens. oc. 12; 
3, 4, of specimen b; phot. Zeiss, apochr. 8, compens. oc. 12. 
5, 6.— Micramphidises of specimen b; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 
7-9.— Microhexactine-derivates of specimen b; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
10, 11.— Fairly regular microhexactines; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6: 
10, of specimen b; 
11, of specimen a. 
12-15.— Microhexactine-derivates of specimen a; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
16, 17.— Minute centrotyle amphioxes of specimen a; magnified 200; phot. Zeiss, apochr. 8, compens. 
oc. 6. 7 
18-21.— Side-views of large dermal pinules; magnified 300; phot. Zeiss, apochr. 8, compens. oc. 6: 
18, 20, 21, pentactine pinules; 
19, a hexactine pinule; 
18, 19, 21, of specimen a; 
20, of specimen b. 
22, 23.— Parts of the shafts of two small macramphidises of specimen b; u. v. phot. Zeiss, q. monochr. 
175 Gls Ores WO), 
24.— Side-view of a small pentactine dermal pinule of specimen a; magnified 300; phot. Zeiss, apochr. 
8, compens. oc. 12. 
25.— Apical view of the lateral rays of a dermal pinule of specimen b; magnified 300; phot. Zeiss, apochr. 
4, compens. oc. 6. 
Hyalonema (Hyalonema) sp. 
Figs. 26-33. Station 4656. 
26.— View of the specimen; reduced 100: 91; phot. Zeiss, anastig. 480/412 mm. 
27, 28.— Rhabd acanthophores; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 
29, 30.— Two microhexactines: 
29, magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6; 
30, magnified 500; phot. Zeiss, apochr. 4, compens. oc. 12. 
31-33.— Tetractine acanthophores; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 
