PLATE 9. 
Thuiaria tubuliformis, page 14. 
The figures are from camera drawings finished by J. H. Emerton. 
Fig. 1. A colony, natural size. 
Fig. 2. Part ofacolony. x 60. 
Fig. 3. A hydrotheca showing successive additions. x 116. 
Figs. 4 and 5. Gonothecae. x 60. 
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