LIST OF IL LUST RATIONS. 



(Names in italics indicate the Sources whence derived. ) 



FIGURK PACK 



1. Amoeba and Vorticella (Haddon, after Howes and Stein), . 8 



2. Group of Vorticellse (Marshall and Hurst), . . .12 



3. Gregarines (after Stein and Riitschli), . . . . 17 



4. Hydra (Original), ....... 21 



5. Distoma Gut (from Claus, after Leuckart), . . .29 



6. ,, Excretory, Nervous, and Reproductive Organs (after 



Sommer), . . . . 30 



7. ,, Reproductive Organs (Claus, after Sommer), . . 32 



8. ,, Development (Clans, partly after Leuckart), . . 37 



9. Txnia, (Landois and Stirling), . . . . . .40 



10. ,, Reproductive Organs (after Sommer), . . .42 



11. ,, Ripe Egg (Landois and Stirling), . . . .44 



12. Cysticerci ( ,, ), . . . .44 



13. ,, ,, everted (Landois and Stirling), . . . 45 



14. Ascaris (von Jaksch), ...... 47 



15. ,, (Original, and after Leuckart, Vogt and Yung, Butschli, 



and Van Beneden), ..... 50 



16. Oxyuris (von Jaksch), . . . . . .53 



17. Trichina (),,. . . . . . 53 



18. Lumbricus Gut, Circulatory Organs, Nervous System (Original), 56 



19. ,, Reproductive Organs (Marshall and Hurst), . 63 



20. ,, Development (after Wilson), . . . .69 



21. A sterias Polar Cells (after Fol and Hertwig), ... . .73 



22. ,, Fertilization (after Fol), . . . .74 



23. Hirudo General Dissections (after Leuckart, and Vogt and Fung), 77 



24. Nephridium and Eye (after Vogt and Yung, and Whitman), 77 

 25 and 26. Astacus ^External Characters (Original), . . .85 



27. Astacus Appendages (Original), . . 88 



28. Gut and Kidney (Original), . . 94 



29. ,, Reproductive Organs (Original). . 99 



30. ,, Eye (after Carriere), . . 104 



31. ,, Blastula and Gastrula (after Reichenbach and Huxley), 105 



32. Unio General Dissection (Claus, after Grobben), . .^ 110 



33. Anodonta Nervous System (Claus, aft^r Keber), . . . 112 



2 b 



