ILLUSTRATIONS. 
PACK 
A Lime-sponge with the living flesh 44 
Spicules of flint-sponges ...... xe 
Sarcode or flesh of a flint-sponge with the spicules ... 46 
Venus' Basket. The skeleton of a flint-sponge ... 47 
Cup-sponge growing at the bottom of the sea . . . .48 
Fresh -water hydra hanging from duckweed . . . .51 
Lasso-cells of the Hydra and Sea- Anemone ... 53 
The Sea-Oak, Scrlularia ....... 56 
The Campanulina, an animal-tree giving off jelly -bells . . 59 
A jelly-fish, Chrysoara hyoscella ...... 63 
The childhood of the same jelly-fish ..... 65 
Section of a Sea- Anemone showing its parts .... 67 
Group of Sea- Anemones 68 
Growth of Red Coral ........ 72 
A section of a piece of Red Coral ...... 73 
A piece of White Coral 74 
The Devonshire Cup-Coral, Caryophyllium Smythit . . 75 
The infancy of a Feather Star-fish ...... 78 
The infancy of a Brittle Star-fish . ..... 79 
The infancy of the common Star-fish ..... 80 
The infancy of a Sea-Urchin . . . . . . .81 
The infancy of a Sea-Cucumber ...... 82 
The common five-fingered Star-fish and the Brittle Star-fish . 84 
Section of the centre and of one ray of a Star-fish ... 85 
The life of a Feather- Star 90 
A Sea-Urchin walking on a rock ...... 94 
A Sea- Urchin with its spines rubbed off . . . . -95 
An Oyster (Ostrea edulis) lying in the shell, showing the gills, 
mouth, etc. ......... 108 
A group of headless Mollusca, Cockle, Mussel, Scallop, and Razor-fish 1 1 1 
Mollusca with heads, Vegetable-feeders, Limpet and Periwinkle 114 
The anatomy of a Periwinkle . . . . . .115 
Flesh-feeding Molluscs, Whelk and Cowry . . . .118 
Garden Snail, Great Grey Slug, and Testacella . . .122 
Naked-gilled Mollusca or sea-slugs, Doris pilosa and Eolis coronata 124 
Oceanic Mollusca, lantkina, Carinaria, and a Pteropod . .125 
Octopus shooting backwards through the water . . .127 
The Mother Argonaut floating in the water . . . .132 
Land-Leeches of Ceylon racing to attack some creature . .143 
Section of a Leech showing the nervous system . . .144 
