PLATE 24. 



Geodia mesotriaena Lendenfeld. 



Figs. 1, 4, 8, 14, 15, 17, 18, 20, 22-32. — var. megana Lendenfeld. 

 Figs. 2, 6, 7, 10-13, 16, 19, 21. — var. microana Lendenfeld. 



Figs. 3, 5, 9. — var. pachana Lendenfeld. 



1. — Group of small spicules in a centrifugal spicule-preparation of var. niegana; magnified 300; phot. 



Zeiss, a]iochr. 4, compens. oc. 6: 



a, parts of small dermal rhabds; b. medium oxyasters. 



2. ~ Group of small spicules in a centrifugal spicule-preparation of var. microana; magnified 100; phot. 



Zeiss, apochr. 16, compens. oc. 6: 

 a, small dermal rhabds; b, euasters. 



3. — Group of small spicules in a centrifugal spicule-preparation of var. pachana; magnified 100; phot. 



Zeiss, apochr. 16, compens. oc. 6: 

 a, small dermal rhabds; b, euasters. 



4. — Group of small spicules in a ccTitrifugal spicule-preparation of var. megana; magnified 100; phot. 



Zeiss, apochr. 16, compens. oc. 6: 

 a, small dermal rhabds; b, euasters. 



5. — Group of small spicules in a centrifugal spicule-preparation of var. pachana; magnified 300. phot. 



Zeiss, apochr. 4, compens. oc. 6: 



a, parts of small dermal rhabds; b, oxysphaerasters ; c, small strongylosphaerasters. 



6. — Group of small spicules in a centrifugal spicule-preparation of var. microana; magnified 300: phot. 



Zeiss, apochr. 4, compens. oc. 6: 



a, part of a small dermal rhabd; b, large oxyaster ; c, small strongylosphaerasters; d, medium 

 oxyaster. 



7. — Group of euasters in a centrifugal spicule-preparation of var. microana; magnified 300; phot. Zeiss, 



apochr. 4, compens. oc. 6: 



a, large oxyaster; b, large strongylosphaeraster; c, oxysphaeraster; d, small strongylo.sphaer- 

 asters. 



8. — Group of euasters in a centrifugal spicule-preparation of var. megana; magnified 300; phot. Zeiss, 



apochr. 4, compens. oc. G: 



a, sterroid; b, oxysphaeraster. 



9. — Group of euasters in a centrifugal spicule-preparation of var. pachana; magnified 300; phot. Zeiss, 



apochr. 4, compens. oc. 6: 



a, large strongylosphaeraster; b, small oxyaster. 



10. 11. — Groups of euasters in a centrifugal spicule-preparations of var. microana; magnified 600; u. v. 



phot. Zeiss, q. monochr. 2.5, q. oc. 5: 



a, large medium oxyaster with blunt conic rays; b, small strongylosphaeraster. 

 12, 13. — Group of euasters in a centrifugal spicule-preparation of var. microana; magnified 600; u. v. 

 phot. Zeiss, q. monochr. 2.5, q. oc. 5: 

 12, focused higher; 13, focused lower; 



a, large medium oxyaster with stout blunt rays; b, small strongylosphaerasters. 



14. — Group of euasters in a centrifugal spicule-prejiaration of var. megana; magnified 600; u. v. phot. 



Zeiss, q. monochr. 2.5, q. oc. 5: 



a, medium oxyasters; b, small strongylosphaeraster. 



15. — Group of large medium oxyasters in a centrifugal spicule-preparation of var. megana; magnified 



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



16. — Small strongylosphaeraster with numerous rays of var. microana, magnified 600; u. v. phot. 



Zeiss, q. monochr. 2.5, q. oc. 5. 



17. 18. — Small strongylosphaerasters with a medium number of rays of var. megana; magnified 900; 



u. V. phot. Zeiss, q. monochr. 2.5, q. oc. 7. 



19. — Medium oxyaster of var. microana; magnified 600; u. v. phot. Zeiss, q. monochr. 2.5, q. oc. 5. 



20. — Group of small strongylosphaerasters in a centrifugal spicule-preparation of var. megana; magni- 



fied 600; u. V. phot. Zeiss, q. monochr. 2.5, q. oc. 5. 



