FIG. 
BOC) ES IEE Ca ES) 
From P. Great Barrier Reef 10; for growth-form, cf. Pl. XTX. 
P. Great Barrier Reef 11; 
P. Great Barrier Reef 13; 
P. Great Barrier Reef 14; 
P. Great Barrier Reef 15; 
P. Great Barrier Reef 16; 
CON M TAP wo YP 
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SORT So SACO INS Ts 
ge) 
EXPLANATION OF THE PLATES. 
P. Great Barrier Reef 2 
P. Great Barrier Reef 3; 
P. Great Barrier Reef 4; 
P. Great Barrier Reef 5; 
P. Great Barrier Reef 6; for aoe: -form of a, ef. Pl. XTX. 
P. Great Barrier Reef ; for growth-form, cf. Pl. X XI. 
P. Great Barrier Reef 8: ; 
P. Great Barrier Reef 9; 
PLATE XIV. 
1. From P. Great Barrier Reef 1; for growth-form, cf. Pl. XXI. 
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PLATE XV. 
P. Great Barrier Reef 17. 
P. Great Barrier Reef 18. 
P. Great Barrier Reef 19; for growth-form, cf. Pl. XX. fig. 2. 
P. Great Barrier Reef 21. 
PLATE XVI. 
From P. Great Barrier Reef 20; for growth-form, cf. Pl. XXI. fig. 10. 
fig, 1 
Pl. XXI. fig. 2 
Pl. XIX. fig. 1 
Pl. XIX. fig. 2 
Pl. XIX. fig. 3. 
fig. 
fig. 3. 
Pl. XXI. fig. 4. 
Pl. XIX, fig, 5. 
fig. 7. 
Pil XOX, fiz. §: 
Pl. XXL fig. 5. 
Pl. XXI. figs. 6 and 7 
Pl. XXI. fig. 12 
Pl, XXI. fig. 9. 
oi 
P. Great Barrier Reef 22; for growth-form, cf. Pl. XXI. fig. 11. 
P. Great Barrier Reef 23 ; 
» 
P. Great Barrier Reef 24; . 
Pl. XXI. fig. 16. 
From the sides of the same, 
PLATE XVII. 
Pl. XXI. fig, 13. 
Pl. XXI. fig. 14. 
From P. Great Barrier Reef 27; for growth-form, cf. Pl. X XI. fig. 15. 
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SIAM PON 
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P. Great Barrier Reef 28; 
specimen a of P. Great Barrier Reef 29; for growth-form, cf. Pl. XXI. fig. 21. 
5: b of the same. 
Zi 
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Pl. XXI. figs. 18 and 19. 
Ie, Grea paren Reef 30; for growth-form, cf. Pl. X XI. fig. 22. 
P. Great Barrier Reef 31; 
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Pl. XXI. fig. 20. 
From top of column, P. Great Barrier Reef 25 ; for growth-form, cf. Pl. XXI. fig. 17. 
From side near the top, P. Great Barrier Reef 25. 
From the tips of P. Great Barrier Reef 26; for growth-forms, cf. Pl. XX. fig. 1, and 
4; of b, cf. Pl. X XI. fig. 8. 
P. Great Barrier Reef 32; represents only one extreme variation of the calicles, 
viz. those with thick reticular walls; cf. Pl. XXI. fig. 23. 
P. Great Barrier Reef 33. 
2Q 
