ACÉPHALES

Fig. 218. Ostrea columba.

Thctis Lvvigata; — Ostrea carinata; — Ostrea columba (fig. 218),

— Nucula bivirgala; — Inoceramus sulcalus (fîg. 219); — Cardium hillanum.

Fig.219. Inoceramus sulcatus BRACHIOPODES.

Terebraiella biplicata; — Sphxruliles agariciformis.

ÉCHINOIDES..

Discoiaea cylindrica; — Discoidea subuculus; — Pygaster trimcalus; — Goniopygus major (fig. 220V

Fig. 220. Goniopygus major