PLATE 13. 



Lanugonychia flabellum Lendenfeld. 

 Figm-es 1-28. 



1. — The distal part of an end-ray of a large discohexaster; magnified 600; phot. Zeiss, apochr. 4, corn- 



pens. DC. 12. 



2. — Part of a large discohexaster; magnified 600; phot. Zeiss, apochr. 4, compens. oc. 12. 



3. — Part of small discohexaster; magnified GOO; phot. Zeiss, apochr. 4, compens. oc. 12. 



4. — Fairly large discohexaster; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 



5. 6. — Groups of spicules from spicule-preparations; magnified 200; phot. Zeiss, apochr. 8, compens. 



oc. 6: 



a, large discohexasters; b, onychhexasters; c, angularly bent, hexactine-derivate diactine. 



7. — Part of the dictyonal skeleton of the stalk; magnified 30; phot. Zeiss, planar 20 mm. 



8. — View of the specimen; natural size; phot. Zeiss, anastig. 480/412 mm. (The stalk is detached 



from the body proper, there is a complete interruption between them at a). 

 9-13. — Megascleres; magnified 30; phot. Zeiss, planar 20 mm.: 



9, side-view of a large pentactine; 



10, apical view of the lateral rays of a small pentactine; 



11, part of a large rhabd; 



12, apical view of the lateral rays of a small pentactine; 



13, side-view of a small pentactine. 



14. — Part of the lamellar sponge-body in transmitted light; magnified 3; phot. Zeiss, anastig. 167 mm. 



15. — Group of microscleres from a spicule-preparation; magnified 200; phot. Zeiss, apochr. 8, compens. 



oc. 6: 



a, discohexasters; b, onychhexasters. 



16. — Group of megascleres from a spicule-preparation; magnified 10; phot. Zeiss, planar 50 mm.: 



a, large, partly broken pentactines; b, small pentactine. 

 17-26. — Ends of end-rays of discohexasters; magnified 2000; u. v. phot. Zeiss, q. monochr. 1.7, q. oc. 10. 



27. — End of an end-ray of an onj'chhexaster; magnified 2000; u. v. phot. Zei.ss, q. monochr. 1.7, q. oc. 10. 



28. — Hexactine-derivate with only one fully developed ray; magnified 600; u. v. phot. Zeiss, q. monochr. 



6, q. oc. 10. 



