Volume 40, 1907
– 259 –

Explanation of Plates XX and XXI.
Plate XX.
Figs. 1–4. Acanthochites mariae, n. sp.; valves 1, 2, 4, 8.
Fig. 5. " valve 8, profile.
Figs. 6, 7. " valve 8, another specimen.
Figs. 9–11. " interior of valves 1, 4, 8.
Figs. 12–14. Tornatina oruaensis, n. sp.
Fig. 15. " another specimen.
Figs. 16–18. Trochus carmesinus, n. sp.
Plate XXI.
Figs. 19–22. Thaumatodon iredalia, n. sp.
Fig. 23. " mira, n. sp.
Figs. 24, 25. Kellia bifurca, n. sp.; right valve.
Figs. 26, 27. " left valve.
Fig. 28. " sculpture.
Fig. 29. " hinge of another specimen.
Figs. 30–32. Rissoina coulthardi, n. sp.
