. Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 : under the command of Captain George S. Nares, R.N., F.R.S. and Captain Frank Turle Thomson, R.N.. rt, view of the outer side ; x 60. Fig. 3. Strand of parenchymal diacts ; x 200. Fig. 4, Parenchymal oxydiact wdth central knot; x 100. Fig. 5. Oxydiact with terminal barbs and four central pointed knobs, cruciatelydisposed; x 200. Fig. 6. Marginal oxydiact with four cruciately disposed central knobs ; x 100. Fig. 7. Large amphidisc ; x 100. Fio-. 8. Inferior part of an anchor-like spicule of the basal
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. Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 : under the command of Captain George S. Nares, R.N., F.R.S. and Captain Frank Turle Thomson, R.N.. rt, view of the outer side ; x 60. Fig. 3. Strand of parenchymal diacts ; x 200. Fig. 4, Parenchymal oxydiact wdth central knot; x 100. Fig. 5. Oxydiact with terminal barbs and four central pointed knobs, cruciatelydisposed; x 200. Fig. 6. Marginal oxydiact with four cruciately disposed central knobs ; x 100. Fig. 7. Large amphidisc ; x 100. Fio-. 8. Inferior part of an anchor-like spicule of the basal tuft; x 100. Fig. 9. S])icules of the basal tuft; x 100. Fig. 10. Oxyhexact with straight smooth rays ; x 500. Figs. 11, 13. Oxyhexasters, which do not belong to Hyalonema (Sfylocalyx)globus, but have intruded from some other form ; x 500. Fig. 12. Tetract with echinated ends, from the basal pad ; x 100. Fig. 14. Oxyhexact with echinated rays ; x 500. Fig. 15. Small amphidiscs ; x 500. Fig. 16. Autodermal pentact pinulus ; x 500. This plate was arranged by Sir Wyville Thomson. For Dictyosjjhcvra on the plate read Hyalonema (Stylocalyx). The Voyage of H MS/Challen^er Hexactmellida.Pl.XL..