PLATE XIV. 
Figs. 1-8. Pilochrota Jiaeckeli, 
Figure 1. Sponge; nat. size. 
„ 2-6. Spicules — 
Fig. 2. Oxea ; x 34. Fig. 5 . Anthaster ; x 430. 
,, 3. Ortliotriffine ; x 34. ,, 6. Chiaster; x 430. 
„ 4. Anatriaene ; x 34. 
„ 7. Section through, the outer part of the cortex in the neiglibourliood of a chone ; x 180. 
,, 8. One of a cluster of cells ; x 430. 
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120 
Figs. 9-15. Pilochrota crassispicula, . . . .128 
„ 9. Sponge ; nat. size. 
,, 10-13. Spicules — 
Fig. 10. Oxea ; x 34. I Fig. 12. Anthaster ; x 430. 
,, 11. Orthotrisene; x 34. I >> 13. Chiaster; x 430. 
„ 14. Section through part of the cortex and choanosome of the sponge, including the margin of 
theoscule; x 15. 
„ 15. A part of the tissue forming the membranous margin of the oscule, more highly magnified; 
X 180. 
Figs. 16-22. Pilochrota anancora, . . . .132 
„ 16. Sponge; nat. size. 
„ 17-20. Spicules — 
Fig. 17. Oxea ; x 49. I Figs. 19, 20. Chiasters ; x 430. 
,, 18. Plagiotrisene ; x 49. | 
„ 21. Section of the exterior of the sponge, showing cortex and choanosome; x 15. 
„ 22. One of the clusters of cells shown in the preceding figure as dark spots in the cortex ; 
X 430. 
Figs. 23-28. Myriastra suhtilis, . 
,, 23. Sponge; nat. size. 
„ 24-28. Spicules — 
Fig. 24. Oxea ; x 32. | Fig. 26. Anatrisene ; x 32. 
,, 25. Dichotrisene ; x .32. I ,,27, 28. Chiasters; x 430. 
\ 
Figs. 29-36. Myriastra toxodonta, 
„ 29. Sponge; nat. size. 
,, 30-35. Spicules — 
Fig. 30. Oxea; x 32. i Fig. 32. Anatrisene; x 32. 
,, 31. Dichotrisene; x 32. I j> 33-35. Chiaster; x 430. 
,, 36. Eadial section, showing the general character of the canal-system; x 15. 
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Fig. 37. Pilochrota purpurea, var. longancora, . . ■ .131 
37. Transverse section through a part of the cortex, showdng the structure of one of the gland- 
like cell clusters; x 292. 
