The paracaudinid sea cucumbers of Australia and New Zealand (Echinodermata: Holothuroidea: Molpadida: Caudinidae) 
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Figure 16. SEM images of ossicles from the mid-body wall of a specimen of Paracaudina tetrapora (H. L. Clark, 1914) from Merricks, 
Westernport Bay, Victoria (NMV F76565). 
