ie 
PLATE 21. 
Holascella taraxacum LENDENFELD. 
Figures 1-13. 
1, 2— A main-ray with its end-rays of an oxyhexaster; magnified 2000; u. v. phot. Zeiss, q. monochr. 
Noy Cl Cres Oe 
1, focussed higher; 2, focussed lower. 
3, 4.— The distal part of an end-ray of a discohexaster; magnified 2000; u. v. phot. Zeiss, q. monochr. 
NGG Ch Ces NOP 
3, focussed higher; 4, focussed lower. 
5-7.— The distal part of end-rays of three different discohexasters; magnified 2000; u. v. phot. Zeiss, q. 
monochr. 1.7, q. oc. 10. “ 
8.— View of the most complete specimen; reduced 1: 0.7; phot. Zeiss, anastig. 480/412 mm. 
9.— Part of an end-ray of an oxyhexaster; magnified 2000; u. v. phot. Zeiss q. monochr. 1.7, q. oc. 10. 
10.— Centrum and main-rays of a discohexaster; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, 
q. oc. 10. 
11, 12.— Large and small discohexasters; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
13.— Small discohexasters; magnified 300; u. v. phot. Zeiss, q. monochr. 6, q. oc. 5. 
