PLATE 44. 



Geodia ataxastra Lendenfeld. 



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

 Fig. 13. — var. latana Lendenfeld. 



1-14. — Cladomcs of raesoproclades; magnified 100; phot. Zeis.s, apochr. 16, compcns. oc. 6: 

 1-12, 14, of var. angustana; 

 13, of var. latatia; 



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. aiiguslana; magnified 100; phot. Zeiss, apochr. If), com- 

 pens. oc. 6. 



23. — Cladome of an anatriaene-derivate with clades reduced to small knobs of var. angitslana; 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. angiisliina 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. Zei.ss, planar 

 20: 



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



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

 phmar 20: 



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



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; il, minute dermal anaclades. 



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



phot. Zei.ss, 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. anyustana; magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6: 



36, side-view. 



37, 38, views of the umliilical 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-rayetl oxyasters; d, 

 minute dermal anatriaene. 

 41, 42. — Cladomcs 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 

 180(); 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. 



