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 macramphidisc of specimen b; magnified 2000; u. v. 



phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 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, 0. — Micraniphidiscs of specimen b; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 7-9. — Microhe.xactine-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. 



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 macramjjhidiscs of specimen b; u. v. phot. Zeiss, q. monochr. 

 1.7, q. oc. 10. 



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. 



