X CONTENTS. 



VIII. 



HALF AN HOUR WITH SEA-ANEMONES. 



Popularity of the study of anemones. Favourites in the marine 

 aquarium. No. of British species. Their zoological cha- 

 racters and divisions. General structure. Comparison with 

 corallines. Actinoloba. Sagartia. Nettling power and 

 organs of latter described. Mimicry. " Daisy anemone," 

 " Cave " ditto, " Kosy " ditto. Mr. Gosse's description of 

 latter. "Orange-disked" anemone, " Parasitic " anemone, 

 &c. Adamsia. The " Opelet," " Beadlet," &c. Longevity 

 and hardy nature of latter. The "Crass," "Strawberry" 

 anemone, &c. Pages 118 to 137 



IX. 



HALF AN HOUR WITH SEA-MATS AND SQUIRTS. 



The Greek physicists. The sea as a life producer. General 

 character of sea-mats. The Flustra. Zoological relations 

 of the group. Its general structure illustrated. Relations 

 to the Brachiopoda. The various species described. The 

 Tunicata, or " sea-squirts." Their zoological characters. 

 The Ascidians. Their structure. Formation of cellulose 

 in outer skin. Cynthia, or " currant-squirter." The 

 Botryllus. Species described. Clavelina, Lepralia, &c. 

 The Salpa. Its alternation of generations, &c. Pages 138 to 155 



X. 



HALF AN HOUR WITH SEA-URCHINS AND STAR-FISH. 



General structure of the above. That of the Echinus detailed. 

 Physiological organisation. Microscopical structure, &c. 

 Pedicellaria. Spicules of different species. The Spa- 

 tangus, " Cushion-stars," &c. The " five-fingered star-fish." 

 General structure of the class. What they feed upon. 

 Ophiura, Solaster, &c. The " Brittle stars/' Professor 

 Forbes on ditto. Opliiocoma. Mr. Kitton's description of 

 hooks, &c. Different species of " Brittle stars " described. 

 The Encrinites. Their geological antiquity. The 

 " Feather-stars." The sea-cucumbers. Spiculse of ditto, 

 &c Pages 156 to 179 



