Sea-Urchins (Sea-Hedgehogs).
'Truly the skill of the Great Architect of Nature is not less displayed in the
construction of the Sea-Urchin than in the building up of a world.'—P. Forbes.
1 THE APLYSIA or SEA-HARE
2 PURPLE-TIPPED SEA-URCHIN
3 Spine of PURPLE-TIPPED SEA-URCHIN
4, 5 Suckers of PURPLE-TIPPED SEA-URCHIN
6 COMMON SUN-STAR