Plate II. 



Fig. i. Echinus acutus, var. Flemingii. 



— 2. — var. norvegicjis, large specimen. 



— 3 — 5. Strongylocentrotus dwbachiensis. 



— 6. Echinus acutus, var. norvegicus, small specimen. 



— 7. Parechinus miliaris (on the plate wrongly called Psammechiiius 



— 8. Echinus acutus, var. meditcrranca. 



