COISTTENTS. 



PAGB 



Branch VII. — Arthropoua 1 



Class I. — Crustacea 6 



Sub-Class I. — Cirripedia . . ' 12 



Order I. — Apoda i . . . . 17 



Order II. — Abdomin alia IT 



Order III. — Khizocephala 18 



Order IV. — Thoracica ... . . 19 



Sub-Class II. — Entomostraca 22 



Order I. — Copepoda . . 22 



Order II. — Siphonostomata 26 



Order HI. — Ostracoda 29 



Order IV. — Cladocera 31 



Order V. — Phtllopoda 36 



Sub-Class III. — Podophthalmia 42 



Order I. — Phyllocakida ... 42 



Order II. — Schizopoda 48 



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. — Edriopiitualmia 68 



Order I. — Isopoda 69 



Order II. — Amphipoda 72 



Sub-Order I. — L.(Emodipoda .72 



Sub-Order II. — Amphipoda genuina 73 



Arthbopoda of Doubtful Position 78 



Pycnogonida 78 



Tardigkada 80 



Gigantostraca ^81 



Trilobita 81 



Merostomata 82 



Pcecilopoda 86 



Eukypterida 86 



Pbntastomida 87 



Class II. — Insecta 89 



Sub-Class I. — Malacopoda 96 



V 



