PLATE III. 
Cinacliyra barbata, 
Figure 1. Sponge ; nat. size. The lower moiety is the basal mass of anchoring 
spicules. 
,, 2, 3. Young sponges, showing the development of the basal mass ; nat. 
size. 
4-8. Spicules — 
Fig. 4. Anisoactinate oxea, esactine point- 
ing upwards; x 16. 
„ 5. Anatrisene; x 16. 
Fig. 6. Protriaene; x 16. 
„ 7. Cortical oxea; x 16. 
,, 8. Sigmaspires; x 220. 
9. Horizontal section through a young sponge. 
10. Transverse section through the cortex and adjacent choanosome ; 
X 20. 
11. Transverse section through the cortex ; x 73. 
12. Transverse section through the outer one-fourth of the cortex ; x 292. 
13. Section through the choanosome, showing the eurypylous chambers; 
X 180. 
,, 14, 15. Tangential sections through the vestibule and cloaca, showing granule 
cells and fusiform cells in the collenchyma, some of the fusiform 
cells directed at right angles to the epithelium; fig. 14 x 360, 
fig. 15 X 540. 
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