PLATE 84. 



Hyalonema (Oonema) bianchoratum pinulina Lendenfeld. 



Figs. 1-10, 15, 26, 27, 30-32 — specimen a. 

 Figs. 11-14, 16-25, 28, 29 —specimen b. 



1. — Part of a transverse section of one of the Palythoa polyps attached to the stalk of specimen a; 



magnified 30; phot. Zeiss, planar 20 mm. 



2. — Part of a section of the choanosome of specimen a; magenta; magnified 30; phot. Zeiss, planar 



20 mm.: a, flagellate chambers. 

 3-13. — Small macramphidiscs from the gastral zone, magnified 100; phot. Zeiss, apochr. 16, compens. 

 00. 6: 

 3-10, of specimen a; 

 11-13, of specimen b. 



14. — Transverse section of one of the polyps imbedded in the body of specimen b; magnified 30; phot. 



Zeiss, planar 20 mm. 



15. — A small micramphidisc of specimen a; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 16-25. — Small micramphidiscs of specimen b; magnified 500: 



16, 21, phot. Zeiss, apochr. 4, compens. oc. 12; 

 17-20, 22-25, phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 

 26, 27. — A terminal anchor of a small macramphidisc of specimen a seen from within; magnified 500; 

 phot. Zeiss, apochr. 8, compens. oc. 12: 



26, focussed lower (on the base of the teeth) ; 



27, focussed higher (on the tips of the teeth). 



28-32. — Side-views of small macramphidiscs; magnified 500; phot. Zeiss, apochr. 8, compens. oc. 12: 



28, a macramphidisc of specimen b, focussed lower (the shaft in focus); 



29, the same macramphidisc focussed higher (the tip of the upper teeth in focus) ; 



30, a macramphidisc of specimen a, focus.sed lower (the shaft in focus) ; 



31, the same macramphidisc, focussed higher (the tip of the upper teeth in focus); 



32, another macramphidisc of specimen a. 



