PLATE 44. 



Geodia ataxastra Lendenfeld. 



Figs. 1-12, 14-49. — var. angustana Lendenfeld. 

 Fig. 13. — var. latana Lendenfeld. 



1-14. — Cladomes of mesoproclades; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6: 

 1-12, 14, of var. angustmui; 

 13, of var. latana; 



1, 2, of mesoprotetraenes ; 



3-11, of fairly regular mesoprotriaenes ; 



12, of a mesoprodiaene ; 



13, 14, of irregular mesoprotriaenes with one or more clades reduced in length and terminally 



rounded. 



15-22. — Cladomes of large anatriaenes of var. angustana; magnified 100; phot. Zeiss, apochr. 16, com- 

 pens. oc. 6. 



23. — Cladome of an anatriaene-derivate with clades reduced to small knobs of var. angustana; magni- 



fied 100; phot. Zeiss, apochr. 16, compens. oc. 6. 



24. — Part of a section through the choanosome of var. angustana; haematoxylin; magnified 200; 



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



25. — View of a cluster of specimens of var. angustana growing together on a stone; natural size; phot. 



Zeiss, anastig. 480 / 412. 



26. — Radial section through the superficial part of var. angustana; magnified 30; phot. Zeiss, planar 



20: 



a, sterraster-armour ; b, radial cortical canal; c, choanosome. 



27. — Thick radial section through the superficial part of var. angustana; magnified 20; phot. Zeiss, 



planar 20: 



a, surface of the sponge; b, protruding mesoproclades. 



28. — Group of spicules from a centrifugal spicule-preparation of var. angustana; magnified 300; phot. 



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



b, small strongylosphaerasters ; c, large oxyaster; d, minute dermal anaclades. 



29. 30. — Groups of asters from a centrifugal spicule-preparation of var. angustana; magnified 540; u. v. 



phot. Zeiss, q. monochr. 6, q. oc. 10: 



b, small strongylosphaerasters; c, large thick-rayed oxyasters; e, large thin-rayed oxyaster. 



31. — Group of spicules from a centrifugal spicule-preparation of var. angustana; magnified 300; phot. 



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



a, minute dermal amphioxes; b, small strongylosphaerasters. 



32. — A minute dermal amphiox of var. angustana; magnified 300; phot. Zeiss, apochr. 4, compens. 



oc. 6. 



33. — Group of spicules from a centrifugal spicule-preparation of var. angustana; magnified 300; phot. 



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



a, minute dermal amphioxes; b, small strongylosphaerasters; c, large thick-rayed oxyasters. 



34. 35. — Groups of asters from a centrifugal spicule-preparation of var. angustana; magnified 540; 



u. V. phot. Zeiss, q. monochr. 6, q. oc. 10: 



b, small strongylosphaerasters; c, large thick-rayed oxyasters; e, large thin-rayed oxyasters. 

 36-38. — Sterrasters of var. angustana; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6: 



36, side-view. 



37, 38, views of the umbilical face. 



39. — Large oxyaster with medium rays; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 



40. — Group of spicules from a centrifugal spicule-preparation of var. angustana; magnified 300; phot. 



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



a, minute dermal rhabds; b, small strongylosphaerasters; c, large thick-rayed oxyasters; d, 

 minute dermal anatriaene. 



41. 42. — Cladomes of anatriaenes of var. angustana; magnified 300; phot. Zeiss, apochr. 4, compens. 



oc. 6. 



43-45. — The umbilicus of a sterraster and the adjacent parts of its surface of var. angustana; magnified 

 1800; u. V. phot. Zeiss, q. monochr. 1.7, q. oc. 10: 

 43, focused high; 44, focused intermediate; 45, focused low. 

 46-49. — Minute dermal anaclades of var. angustana; magnified 300; phot. Zeiss, apochr. 4, compens. 

 oc. 6. 



