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‘Figs. 1-4.—Plumularia abietina. 
Fig. 1.—Natural size, with young Avicula-like Mollusca attached to the stem and branches. 
Fig 2.—Portion of hydrocladium magnified ; lateral view. 
Fig. 3.—Same ; front view. 
Fig. 4.—Portion of a branch with gonangium. 
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