PLATE 48. 



Geodia lophotriaena Lendenfeld. 

 Figures 1-34. 



I, 2. — Large oxyaster; magnified 1800; 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, compena. oc. 2. 

 8, 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, 

 compens. oc. 6: 



a, minute dermal amphiox; b, sphaerasters. 



II. — 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 oxya.sters. 

 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 oxyaster; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 



22. 23. — Strongylosphaerasters; magnified 1800; u. v. phot. Zeiss, 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, focused 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 umbiHcus; magnified 1800; u. v. phot. Zeiss, 



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

 33, focused lower; 34, focused higher. 



