PLATE 19. 



Holascus edwardsii Lendenfeld. 

 Figures 1-24. 



1-3. — Oxyhexasters; magnified 600; phot. Zeiss, apochr. 4, compens. oc. 12. 

 4, 5. — Parts of hemioxyhexasters; magnified 600; 



4, phot. Zeiss, H. I. apochr. 2, compens. oc. 6; 



5, phot. Zeiss, apochr. 4, compens. oc. 12. 



6-10. — Oxyhexasters and hemioxyhexasters; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 



11. — An end-ray of an oxyhexaster; magnified 2000; ii. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 



12, 13. — The central part (the main-rays) of a graphiocomo; magnified 600; phot. Zeiss, apochr. 4, 



compens. oc. 12: 

 12, focussed high; 13, focussed low. 



14. — Part (the two tips) of a ring-shaped sigm; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. 



oc. 10. 



15. — Ring-shaped sigm with the spiral axis obhquely situated; magnified 600; phot. Zeiss, apochr. 4, 



compens. oc. 12. 



16-21. — Ring-shaped sigms with the spiral axis parallel to the optical axis of the microscope; magnified 

 600: 



16, 19-21, phot. Zeiss, apochr. 4, compens. oc. 12; 



17, 18, phot. Zeiss, H. I. apochr. 2, compens. oc. 6. 



22-24. — Centrotyle rhabds; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 



