PLATE 39. 



Geodia japonica (Sollas). 

 Figures 1-41. 



1-9. — Small dermal rhabds (amphioxes); magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 

 10-12. — Groups of small strongylosphaerasters and a single one from a centrifugal spicule-preparation; 



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

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



compens. oc. 6: 



a, large oxyasters; b, small strongylosphaerasters; c, a minute dermal anaclade. 

 14-17. — Minute dermal anaclades; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6: 

 14, 15, with well-developed cladomes; 

 16, 17, with reduced cladomes. 

 18-24. — Large oxyasters; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 

 25, 26. — Parts of large oxyasters; magnified 1800; u. v. phot. Zei.ss, q. monoehr. 1.7, q. oc. 10. 

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

 oehr. 6, q. oc. 10: 



a, large oxyaster; b, small strongylosphaerasters. 

 28-32. — Sterrasters; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6: 

 28, 29, en face views with the imibilicus near the centre of the upper side; 

 30-32, profile views with the umbiUcus at or near the margin. 



33. — A large oxysphaeraster ; magnified 1800; u. v. phot. Zeiss, q. monoehr. 1.7, q. oc. 10. 



34, 35. — The umbilical part of the surface of a sterraster; magnified 1800; u. v. phot. Zeiss, q. monoehr. 



1.7, q. oc. 10: 

 34, fociised higher; 35, focused lower. 

 36, 37. — Two strongylosphaerasters from a centrifugal spicule-preparation; magnified 1800; u. v. 

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

 36, focused lower; 37. focused higher. 

 38, 39. — Cladomes of minute dermal anaclades; magnified 1000; phot. Zeiss, hom. imm. apochr. 2, 

 compens. oc. 6. 



40, 41. — Large oxysphaeraster; magnified 1800; u. v. phot. Zeiss, q. monoehr. 1.7, q. oc. 10: 

 40, focused higher; 41, focused lower. 



