PLATE 29. 



Eurete spinosum Lendenfeld. 

 Figures 1-26. 



1, 2. — Scopules; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 



3-6. — The centres and end-rays of two scopules; magnified 600; phot. Zeiss, apochr. 4, compens. oc. 12: 



3, a scopule-centre focussed high; 



4, the centre of the same scopule focussed lower; 



5, the centre of another scopule focussed high; 



6, the centre of the same scopule focussed lower. 



7, 8. — The centre and end-rays of a scopule; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc, 10: 



7, focussed higher; 8, focussed lower. 



9. — The central part of a hemioxyhexaster; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 10-13. — Hemioxyhexasters and parts of such; magnified 600; phot. Zeiss, apochr. 4, compens. oc. 12: 



10, an ordinary, fairly regular, slender-rayed hemioxyhexaster; 



11, 13, parts of ordinary, fairly regular, slender-rayed hemioxyhexasters; 



12, a stout-rayed irregular hemioxyhexaster. 



14-17. — The distal end-parts of main-rays of hemioxyhexasters with one of the end-rays or part of it; 



magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 18, 19. — The two faces of the skeleton-net; magnified 6.6; phot. Zeiss, planar 50 mm.: 



18, the dermal face; 



19, the gastral face. 



20, 21. — Apical views of two superficial pentactines (the crosses formed by their lateral rays); magni- 

 fied 200; phot. Zeiss, apochr. 8, compens. oc. 6. 



22. — A lateral ray of a superficial pentactine; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 



23. — Part of the dermal zone of the skeleton-net; magnified 50; phot. Zeiss, apochr. 16, compens. oc. 4. 



24. — Part of the gastral zone of the skeleton-net; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 0. 



25. — Part of the gastral zone of the skeleton-net; magnified 50; phot. Zeiss, apochr. 16, compens. oc. 4. 



26. — Grou]) of spicules from a spicule-preparation; magnified 200; phot. Zeiss, apochr. 8, compens. 



oc. 6: 



a, a scopule; b, hemioxyhexasters. 



I 



