Plate IL 



Fig. I. Echinus acutiis^ var. Flemingii. 



— 2. — — var. norvegicus^ large specimen. 



— 3 — 5. Styongyloceiitrotns drobachirnsis. 



— 6. Echiiuts acjttns, xSiX. 7wrvegtctts, small specimen. 



— 7. Parechi'niis niiliaris (on the plate wrongly called Psaiiniicchinns-' 



— 8. Echiiiiix aaitns, var. uiediterranea. 



