XVII.—BRANCH CŒLENTERATA: THE POLYPS, SEA-ANEMONES, CORALS, AND JELLYFISHES.
Polyps, sea-anemones, corals, and jellyfishes.
General form and organization of body, [93.]—Structure, [94.]—Skeleton, [95.]—Development and life-history, [95.]—Classification, [96.]—The polyps, colonial jellyfishes, etc. (Hydrozoa), [97.]—The large jellyfishes, etc. (Scyphozoa), [101.]—The sea-anemones and corals (Actinozoa), [102.]—The Ctenophora, [107.]
XVIII.—BRANCH ECHINODERMATA: THE STARFISHES, SEA-URCHINS, SEA CUCUMBERS, ETC.
Example: Starfish (Asterias sp.) [Laboratory exercise].—External structure, [108.]—Internal structure, [110.]—Life-history and habits, [113.]
Example: Sea-urchin (Strongylocentrus sp.) [Laboratory exercise].—External structure, [113.]
Other Starfishes, Sea-urchins, Sea cucumbers, etc.
Shape and organization of body, [116.]—Structure and organs, [117.]—Development and life-history, [119.]—Classification, [120.]—Starfishes (Asteroidea), [121.]—Brittle stars (Ophiuroidea), [122.]—Sea-urchins (Echinoidea), [123.]—Sea-cucumbers (Holothuroidea), [124.]—Feather-stars (Crinoidea), [125.]
XIX.—BRANCH VERMES: THE WORMS.
Example: The Earthworm (Lumbricus sp.) [Laboratory exercise].—External structure, [127.]—Internal structure, [129.]—Life-history and habits, [133.]