VI CONTENTS. 



. PAGE 

 Order 3. Pseudoneuroptera, . . . . . .99 



Order 4. Hemiptera, ....... 99 



Order 5. Neuroptera, ....... 99 



Order 6. Trichoptera, ..... .99 



Order 7. Strepsiptera, . . . . . . .99 



Order 8. Diptera, . . . . . . .101 



Order 9. Aphaniptera, ... . 101 



Order 10. Coleoptera, ....... 101 



Order 11. Hymenoptera, ...... 101 



Order 12. Lepidoptera, . . . . . . .101 



Phylum IV. Molluscoidea, . . . . . . .105 



Class I. Polyzoa (Bryozoa), . . . . . . .105 



Order 1. Vermiformia, . . . . . . .105 



Order 2. Eupolyzoa, . . . . . . .105 



Class II. Brachiopoda, . . . . . . .109 



Order 1. Ecardines, . . . . . . .109 



Order 2. Testicardines, . . . . . . .109 



Phylum V. Mollusca, . . . . . . .113 



Subphylum A. Lipocephala (Acephala), . . . . .113 



Class I. Larnellibranchiata (Conchifera), . . . , .113 



Order 1. Asiphonida, ....... 113 



Order 2. Siphonida, ....... 113 



Subphylum B. Glossophora, . . . . ... 118 



Class I. Scaphopoda, ..... .118 



Class II. Gastropoda, . . . . . . .121 



A. Gastropoda Isopleura, . . . . . .121 



Order 1. Solenogastres (Amphiueura), .... 121 



Order 2. Polyplacophora, . . . . . .121 



B. Gastropoda Anisopleura, ...... 121 



Order 1. Streptoneura (Prosobrauchia), . . . .121 



Order 2. Euthyneura, . . . . . .121 



Class III. Pteropoda, . . . . . . . 126 



Order 1. Thecosomata, . . ... 126 



Order 2. Gymnosomata, ...... 126 



Class IV. Cephalopoda (Siphonopoda). . . . . .129 



Order 1. Tetrabranchiata, . . . . . .129 



Order 2. Dibranchiata, . 129 



