Geodia lophotriaena Lendenfeld. 



Figures 1-34. 



1, 2. — Large oxyaster; magnified ISOO; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 



1, focused higher; 2, focused lower. 

 3-7. — Large amphioxes; magnified 50; phot. Zeiss, apochr. 16, compens. oc. 2. 

 g_ 9. — Minute dermal amphioxes; magnified 300 ; phot. Zeiss, apochr. 4, compens. oc. 6. 



10. — Group of spicules from a centrifugal spicule-preparation ; magnified 300; phot. Zeiss, apochr. 4, 

 comj)ens. oc. 6: 



a, minute dermal amphiox; b, sphaerasters. 

 11. — Large oxyaster; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 

 12. — Group of asters from a spicule-preparation; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6: 



a, sphaeraster; b, large oxyasters. 

 13_15. — Strongylosphaerasters; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 

 16-18. — Large oxyaster; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 



16, focused high ; 17, focused intermediate; 18, focused low. 

 19. — Oxysphaeraster; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 20. — Strongylosphaeraster; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 21. — A ray of a large o.xyaster; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 22, 23. — Strongylosphaerasters; magnified 1800; u. v. phot. Zei.ss, q. monochr. 1.7, q. oc. 10. 

 24-26. — Strongylosphaeraster; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 



24, focused high; 25, focused intermediate; 26, focused low. 

 27-29. — Sterrasters; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 



30, 31. — The umbilicus and adjacent parts of the surface of a sterraster; magnified 1800; u. v. phot. 

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

 30, focused lower; 31, focu,sed higher. 

 32. — Group of asters from a centrifugal spicule-preparation; magnified 540; u. v. phot. Zeiss., q. mon- 

 ochr. 6, q. oc. 10: 



a, sphaerasters; b, large oxyasters. 

 33, 34. — Part of the surface of a sterraster opposite the umbilicus; magnified 1800; u. v. phot. Zeiss, 

 q. monochr. 1.7, q. oc. 10. 

 33, focused lower; 34, focused higher. 



