CONTENTS. 



SUB-KINGDOM, 



PAGE 



I. PROTOZOA, ....... 1 



II. CCELENTERATA, . . . . . .15 



III. ECHINODERMATA, ...... 27 



IV. ANNULOSA, ....... 36 



V. MOLLUSCA, ....... 73 



VI. VERTEBRATA, ...... 86 



