PLATE 6. 



Erylus caliculatus Lendenfeld. 

 Figures 1-13, 19-23, 2G, 28, 29. 



Erylus rotundus Lendenfeld. 



Fijis. 14, IS, 2-4, 33-3"). — var. megarhabda Lendenfeld. From A. South Molokai. 



Figs. 15-17, 25, 30-32. — var. typica Lendenfeld. Form B. Kauai. 



Fig. 27. — var. typica Lendenfeld. Form .\. Soutli Molokai. 



1, 2. — Microrhabds of Erylus caliculatus : magnified 600; u. v. phot. Zeiss, q. monochr. 6, q. oc. 10. 

 3. — Small oxysphaerasterof £riyi»,'?co/ic!/fcr/us; magnified 600; u. v. phot. Zeiss, q. monochr. 6, q. oc. 10. 

 4, 5. — Groups of microscleres from a ccntrifugc-.'spicule preparation of Erylus caliculatus; magnified 600; 

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



a, microrhabds; b, acanthtylasters. 



6-13. — .\canthtyla.sters of Erylus caliculatus; magnified 600; n. v. phot. Zeiss, q. monochr. 6, q. oc. 10. 



14. — Group of microscleres from a centrifuge-spieule preparation of Erylus ri>tundus var. megarhahda 



from South Molokai (form A); magnified 600; u. v. phot. Zeiss, q. monochr. 6, q. oc. 10: 



b, acanthtylasters; c, small oxysphaeraster. 



15, 16. — .\canthtylasters of a dark specimen of Erylus rotundus var. typica from Kauai (form B); 



magnified 600; vi. v. phot. Zcis-s, q. monochr. 6, q. oc. 10. 

 17-22. — Aspidasters; magnified 600; u. v. phot. Zeiss, q. monochr. 6, q. oc. 10: 



17, nearly adult aspidasterof a dark specimen of Erylus rotundus var. typica from Kauai (form B); 



IS, adult aspidaster of a .<!pecimen of Erylus rotundus var. megarhahda from South Molokai (form A) ; 



19, adult, circular aspidaster with numerous protruding rays of Erylus caliculatus; 



20, yoimg, circular aspidaster with few protruding rays of Erylus caliculatus; 



21, adult, rcniform aspidaster with numerous protruding rays of Erylus caliculatus; 



22, young, smooth, reniform aspidaster of Erylus caliculatus. 



23. — Superficial, paratangential section of Erylus caliculatus; magnified 30; phot. Zei.ss, planar 20 mm. 

 24. — Radial section through the superficial part of Erylus rotundus var. megarhahda from South Molokai 



(form A); magnified 10; phot. Zeiss, planar 50 mm. 

 25. — Radial section through the choanosome of a dark specimen of Erylus rotundus var. typica from 

 Kauai (form B); magnified 20; phot. Zeiss, planar 20 mm. : 

 a, radial bundle of rhabd mcgascleres. 

 26. — Radial section through the superficial part of Erylus caliculatus; magnified 30; |ihot. Zeiss, 

 planar 20 mm. : 



a, radial bundle of rhabd mcgascleres. 

 27. — Paratangential .section, a small distance below the surface, of Erylus rotuixhis var. typica from 

 South Molokai (form A); magnified 100; phot. Zeiss, apochr. 16, comjiens. oc. 6: 

 a, group of triaene-cladomes. 

 28, 29. — Radial sections through the choanosome of Erylus caliculatus; anihne-blue: 



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



29, magnified 100; phot. Zei.ss, apochr. 16, compens. oc. 6. 



30-35. — Microrhabds of Erylus rotundus; magnified 600; u. v. phot. Zeiss, q. monochr. 6, q. oc. 10: 

 30-32, of a dark specimen of var. tyjrica from Kauai (form B); 

 33-35, of a specimen of var. megarhahda from South Molokai (form A). 



