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ophis: bladder wrack
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ophis: bladder wrack with barnacles and periwinkles on red conglomerate
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ophis: some branches tipped with warty vesicles
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ophis: blades flattened with raised midribs
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ophis: some blades with air-filled floats alone or in pairs on either side midribs
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ophis: ovoid vesicles to 11 mm long, sometimes forked
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ophis: vesicular warts evidently with apical pores
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ophis: vesicle lit from front and back
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ophis: vesicle cut along suture
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ophis: lower blades with hardened encrustations