CONTENTS xvii 



PAGE 



7. THE BLOOD-VASCULAR SYSTEM AND THE BODY CAVITY . . . 358 



8. EXCRETORY ORGANS (Antennal Glands, Shell Glands) . . . 368 



9. THE CONNECTIVE TISSUE ....... 370 



10. THE SEXUAL ORGANS . ..... 370 



11. SEXUAL DIMORPHISM ....... 376 



12. HERMAPHRODITISM IN THE CRUSTACEA ..... 381 



13. PARTHENOGENESIS CYCLIC REPRODUCTION .... 382 



14. ONTOGENY ........ 382 



15. PHYLOGENY ........ 406 



Literature ......... 411 



FIRST APPENDAGE TO THE CRUSTACEA 



1. Trilobites ......... 414 



2. Gigantostraca . . ..... 415 



3. Hemiaspidse ........ 416 



4. Xiphosura ......... 417 



Literature . . . . . . . . 421 



SECOND APPENDAGE TO THE CRUSTACEA 



Pantapoda ......... 422 



Literature ........ 425 



CHAPTER VI 

 SECOND DIVISION OF THE ARTHROPODA 



Tracheata ......... 426 



CLASS I. Protracheata . . .... 427 



Literature ......... 437 



CLASS II. Antennata .... ... 438 



Systematic Review ........ 438 



1. OUTER ORGANISATION ....... 44.3 



A. THE BODY ........ 443 



B. THE LIMBS ....... 445 



2. THE INTEGUMENT AND GLANDS . ... 458 



3. THE MUSCULATURE . . 460 



4. THE ENTERIC CANAL ....... 460 



5. THE NERVOUS SYSTEM . .... 464 



6. THE SENSORY ORGANS . . .... 469 



A. EYES .... 469 



B. AUDITORY ORGANS . . . . . . .471 



C. OLFACTORY AND GUSTATORY ORGANS 474 



