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"Tergal skeleton of Asterius rubens. a, connecting pieces; b, spinebearing plates." — Encyclopedia Britannica, 1893

Asterius Rubens

"Tergal skeleton of Asterius rubens. a, connecting pieces; b, spinebearing plates." — Encyclopedia…

"Asterias rubens. a, 4-ranked pedicelis; b, end of pedicel magnified." — Encyclopedia Britannica, 1893

Asterius Rubens

"Asterias rubens. a, 4-ranked pedicelis; b, end of pedicel magnified." — Encyclopedia Britannica,…