PLATE XXVI. 
Synops neptuni, 
Figure 1. Transverse section through the sponge ; one-half the natural size. 
5? 
2-10. Spicules — 
rigs. 2, 3. 
» 4 . 
5. 
6 . 
Oxeas ; X 7 3. 
Ortliotrisene ; x 73. 
Spheraster; x 73. 
Choanosomal chiaster; x 73. 
Fig. 7. Somal chiaster ; x 73. 
„ 8. Sterraster ; x 292. 
„ 9. Choanosomal chiaster; x 360. 
„ 10. Somal chiaster ; x 292. 
,, 11,12. Transverse sections through the cortex, passing longitudinally through 
the middle of excurrent chones ; x 32. 
13. Transverse section through the cortex passing through two incurrent 
chones ; x 32. 
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