Clipart tagged: ‘Psammechinus’

"A common European type of the group is the species Psammechinus esculentus. In certain forms the test is perforated by slit-like apertures." — Encyclopedia Britannica, 1893

Psammechinus esculentus

"A common European type of the group is the species Psammechinus esculentus. In certain forms the test…

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