CONTENTS. 



PAGE 



BRANCH VII. ARTHROPODA 1 



CLASS I. CRUSTACEA . 6 



SUB-CLASS I. CIRRIPEDIA . .12 



ORDER I. APODA 17 



ORDER II. ABDOMINALIA . .17 



ORDER III. RHIZOCEPHALA 18 



ORDER IV. THORACICA 19 



SUB-CLASS II. ENTOMOSTRACA .22 



ORDER I. COPEPODA 22 



ORDER II. SIPHONOSTOMATA .... . .26 



ORDER III. OSTRACODA 29 



ORDER IV. CLADOCERA 31 



ORDER V. PHYLLOPODA . .36 



SUB-CLASS III. PODOPHTHALMIA 42 



ORDER I. PHYLLOCARIDA 42 



ORDER II. SCHIZOPODA 43 



ORDER III. DECAPODA 44 



SUB-ORDER I. MACRURA .... 48 



SUB-ORDER II. BRACHYURA 58 



ORDER IV. STOMATOPODA 65 



ORDER V. CUMACEA . .67 



SUB-CLASS IV. EDKIOPHTHALMIA 68 



ORDER I. ISOPODA . .69 



ORDER II. AMPHIPODA 72 



SUB-ORDER I. L^EMODIPODA . . .... 72 



SUB-ORDER II. AMPHIPODA GENUINA . . ,73 



ARTHROPODA OF DOUBTFUL POSITION 78 



PYCNOGONIDA 78 



TARDIGRADA 80 



GlGANTOSTRACA ' 81 



TRILOBITA 81 



MEROSTOMATA 82 



PCECILOPODA 86 



EURYPTERIDA 86 



PENTASTOMIDA 87 



CLASS II. INSECTA 89 



SUB-CLASS I. MALACOPODA . . .96 



