PLATE 15. Entomostraca. 



Figure 



1 . Argulus foliaceus, seen from beneath. 0, anterior, b, posterior antennae ; c, 



rostrum ; d, suckers, representing the first pair of legs ; e y second pair of 

 legs ; /", four posterior pairs of legs. 



2. Bosmina longirostris ; 2*, the same, natural size. 



3. Branchipus stagnalis. 4. Camptocercus macrourus. 



5. Candona reptans ; 5 0, inferior antenna. 



6. Canthocamptus minutus ; 6 0, inferior antenna ; 6 b, first pair of foot-jaws ; 



6 e, second pair of foot-jaws. 



7. Chydorus sphcericus. 



8. Cyclops quadricornis, male, 0, b, superior antennae. 



9. Cyclops quadricornis, female, a, superior, b, inferior antennas ; c, external 



ovaries. 



10. Cyclops quadricornis ; inferior antenna. 



1 1 . Cyclops quadricornis ; mandible. 0, body ; 5, serrated seta ; c, filaments of 



palp. 



12. Cyclops quadricornis; first pair of foot-jaws. 



13. Cyclops quadricornis', second pair of foot-jaws; 130, internal portion; 136, 



external portion. 



14. Cyclops quadricornis ; first pair of thoracic feet. 



15. Cyclops quadricornis; fifth pair of legs. 



16. Cyclops quadricornis ; recently hatched. 



17. Cypris tristriata. 18. Cypris tristriata ; superior antenna. 

 19. Cypris tristriata ; inferior antenna. 20. Cypris tristriata ; mandible. 



21. Cypris tristriata ; first pair of jaws. 0, basal plate ; 5, branchial lamina. 



22. Cypris tristriata; second pair of jaws. 23. Cypris tristriata ; first pair of legs. 



24. Cypris tristriata ; second pair of legs. 



25. Cypris tristriata; lateral half of the abdomen. 



26. Cy there inopinator. 27. Daphnella Wingii. 



28. Daphnia pulex. a y superior antennae ; b, inferior antennae ; c, heart. 



29. Daphnia pulex ; first pair of legs. 30. Daphnia pulex ; second pair of legs. 

 31. Daphnia pulex ; third pair of legs. 32. Daphnia pulex ; fourth pair of legs. 

 33. Daphnia pulex ; fifth pair of legs. 34. Daphnia pulex ; mandible. 



35. Daphnia pulex ; lab rum. 36. Daphnia pulex ; jaw. 



37. Daphnia reticulata. a, ephippium. 38. Diaptomus castor. 

 39. Eurycercus lamellatus. 



