LIST OF ILLUSTKATIONS. 
PAGE 
Plate IX. — Reproduction of Chrysaora and Truncatulina , . 218 
Plate X. — Ophryodendron ahietinum^ .... 274 • 
Plate XI. — Opliryodendron, DendropJiyra, Atradylis palliata, 276 
Plate XII — Hydractinia, Lar safellarum, Trichidra pudica^ 
Cunina globosa, Sertularia pumila, . . . 276 
Woodcut — Fig. 1. Atlas of a young Chetonia virgata, . . 225 
Fig, 2. Dorsal vertebra of a young seal, . . 225 
,, Fig. 3. Superior aspect of the axis of a human foetus, 225 
Fig. 4. Inferior aspect of the atlas of a human foetus, 225 
, , Fig. 5. Cervical vertebra from a human foetus, . 225 
Ovisac of Eudendrium confertum, . . . 279 
