xi CONTENTS. 
CHAPTER VI. 
Siphonophora or Oceanic Hydrozoa—Calycophoridee—Physo- 
phoride, . : , ‘ : : ; F ‘ 75-78 
CHAPTER VII. 
Discophora or Medusidee—Structure of Naked-eyed Meduse— 
Their nature, . ‘ ‘ : ; ; : a= 79-82 
Ph 
CHAPTER VIII. 
Lucernarida—Hidden-eyed Medusse—Development of Lucer- 
nida—Rhizostomide—Graptolitide, ; ; . 83-89 
CHAPTER IX. 
General characters of the Actinozoa—Zoantharia—Anatomy of 
a Sea-anemone—Zoantharia sclerodermata—Sclerodermic 
and Sclerobasic Corals—Coral-reefs—Zoantharia sclero- 
basica — Alcyonaria — Gorgonidze — Red Coral — Rugose 
Corals—Ctenophora—Anatomy of Pleurobrachia—Tabular 
view of the divisions of the Ccelenterata, . , ; 90-102 
CHAPTER X. 
General characters of the Annuloida—General characters of the 
Echinodermata—Divisions of the Echinodermata—Echin- 
oidea—Anatomy of Echinus—Asteroidea—Ophiuroidea— 
Crinoidea—Cystoidea and Blastoidea—Holothuroidea, 103-116 
CHAPTER XI. 
General characters of the Scolecida—Divisions of the Scolecida 
—Teeniada— Development of a Tape-worm—Cystic worms 
—Trematoda — Turbellaria— Acanthocephala—Gordiacea 
—Nematoda—Rotifera—Tabular view of the divisions of 
the Annuloida, . ‘ ; on 4 . - 117-127 
CHAPTER XII. 
General characters of the Annulosa—Characters of the Anar- 
thropoda—Gephyrea—Annelida—Divisions of the Anne- 
lida—Hirudinea—Oligocheta—Tubicola—Errantia, . 128-135 
CHAPTER XIII. 
General characters of the Arthropoda—Divisions of the Arthro- 
poda, : . : : 7 136-137 
CHAPTER XIV. 
General characters of the Crustacea—Decapoda—Macrura— 
Anomura — Brachyura — Isopoda— Merostomata— Trilo- 
_ bita—Cladocera, Copepoda, and Ostracoda—Cirripedia— 
Appendix of the remaining orders of Crustaceans, 138-148 
