Geodia breviana Lf.ndenfeld. 



Figures 1-12. 



1. — Two mimitp dermal anaclades in situ protriuiiiig: from the surface; magnified 300; jjhot. Zeiss, 



apoclir. 8, compens. oc. 6. 

 2-9. — Minute dermal anaclades: 



2, 4, 6, S, entire dermal anaclades; magnified 150; phot. Zeiss, apochr. 8, compens. oc. 6; 



3, 5, 7, 9, the cladomes of the dermal anaclades represented to the left of them in Figs. 2, 4, 6. and 

 8; magnified 400; phot. Zeiss, apochr. 4, compens. oc. 6; 



2-5, triaenes: 

 6, 7, a diaene; 

 8, 9, a monaene. 

 10-12. — Minute dermal amphioxes; magnified 150; phot. Zeiss, apochr. 8, compens. oc. 6: 



10, a slightly curved one; 



11, 12, two angularly bent ones. 



Geodia micropora Lendenfeld. 

 Figures 13-36. 



13-17. — Cladomes of mesoproclades ; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6: 



13, 15, of mesoprotriaenes; 



14, of an irregular mesoclade; 



16, of a mesoprodiaene; 



17, of a mcsopromonaene. 



IS, 19. — Group of asters from a centrifugal spicule-preparation; magnified 1800; u. v. phot. Zeiss, q. 

 monochr. 1.7, q. oc. 10: 



15, focused higher; 19, focused lower; 



a, small strongylosphaerasters ; b, large oxysphaeraster. 

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

 21-23. — Sterrasters; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6: 



21, a young sterraster; 



22, 23, full-grown sterrasters. 



24-27. — Spicules and groups of such from centrifugal spicule-preparations; magnified 300; phot. Zeiss, 

 apochr. 4, compens. oc. 6: 



a, dermal rliabds; b, small strongylosphaerasters; c, large oxysphaerasters ; d, large oxyasters. 

 28. — Group of small strongylosphaerasters; magnified 1800; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 

 29. — Part of the surface of the sponge; magnified 3; phot. Zeiss, anastig. 167. 



30,31. — Umbilical part of the surface of a full-grown terraster; magnified ISOO; u. v. phot. Zeiss, q. 

 monochr.1.7, q. oc. 10: 



30, focused higher; 31, focused lower. 

 32. — View of the sponge; reduced 1 : 095; phot. Zeiss, anastig. 480 / 412 mm. 



33. — Group of asters from a centrifugal spicule-preparation; magnified 1800; u. v. phot. Zeiss, q. mon- 

 ochr. 1.7, q. oc. 10: 



a, small strongylo-sphaeraster; b, large oxysphaeraster. 

 34. — Group of asters from a centrifugal spicule-preparation; magnified 1800; u. v. phot. Zeiss, q. 

 monochr. 1.7, q. oc. 10: 



a, small strongylosphaerasters; b, large oxyaster. 

 35, 30. — Umbilical part of the surface of a not quite fully developed sterraster; magnified 1800; u. v. 

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

 35, focused higher; 36, focused lower. 



