LIST OF ILLUSTRATIONS. 



NO. PAGE 



1. Volvox globator, Original, . . ., *, $ 



2. Do. do., burst, . . . .. ' .. .do. . . . . 4 



3. Enchelis pupa, ...... do. ,;., . . ;.$&&+*>:. 8 



4. Enchelis showing constriction, . . . do. ...; , ( , . 8 



5. Enchelis further advanced, . . . ' do. . . ., . 8 



6. Enchelis dividing, do. ... . 9 



7. Zygnema, first stage, . . . % . do. .... 10 



8. Zygnema, second stage, , . . . do 10 



9. Zygnema, third stage, . . . -^ . do. . . . .10 



10. Single cell, Pineapple, do. .... 12 



11. Cells of Cucumber, ..... do. .... 12 



12. Polyhedral cells, Authors,* ... 12 



13. Pith of Elder, ...... Original, .... 13 



14. Pith of Elder, . .-;..'>..-"!..,,? . Authors, .... 13 



15. Section of Cherry, Original, . . . .13 



16. Section of Potato, do 14 



17. Corpuscle, Potato starch, .... do. . _. . . 14 



18. Corpuscle of Tous les mois, .... do 14 



19. Corpuscle of Indian Corn, ... do. .... 15 



20. Corpuscle of Wheat, do. w . . 15 



21. Corpuscle of Eice, .<; . do. .-;.*; t .'>- ; . 15 



22. Section of grain of Wheat, . . +> ,'^i,4ou .*. :. 16 



23. Section of grain of Mountain Eice, . . do. . . '. . 16 



24. Section of Almond, . . . . * do. . ; . . . . 19 



25. Section of Cocoanut, . . . . ^ * . do. . . \ . 19 



26. Lactiferous vessels, . . . . Authors, .... 20 



27. Eaphides of Onion, Original, . .- . : \. . 22 



28. Eaphides of Ehubarb, do. .... . 22 



29. Eaphides of Beet root, .... Authors,. .'/, . 22 



30. Melon Cactus, do. . . .. t . . 22 



81. Encephalatus pungens, .... do. r ,;;*-, . . 22 



32. Squilla maritima . . . ,.. : .. ;r - : . do 23 



33. Cells of Eumex, .... T' do. .. . . .23 



34. Cells of Maple leaf, showing Eaphides, . Original, .... 23 



35. Testa of the Elm, with Eaphides, . . do. .... 24 



* By "Authors" is meant that all who have written on this subject have used the same 

 figure, and when good, they have been preferred to copying a preparation, simply to save time. 



