ILLUSTRATIONS 



NUMBER PLATE 



Transverse Section of Echinus Spine . 



Frontispiece . 



1. Student Microscope and Portable Camera. , 



2. Adjustable Camera. Upright to Horizontal . 



3. Walmsley's Enlarging and Reducing Photo- 



Micrographic Camera 



4. Walmsley's Camera and Microscope, with- 



out Ocular 



5. Walmsley's Camera arranged for Focusing . 



with Microscope ^ 



6. Walmsley's Camera and Microscope arranged 



for High Powers 



7. Carcinoma of Mammary Gland . 



8. Suctorial Tubes, Tongue of Blow -Fly 



9. Aulacodiscus Oreganus. Diatom ... 



10. Voluntary Muscle. Man 



n. Karyokinetic Figure in Leucocyte ... 



12. Pleurosigma angulatum. Diatom 



13. Grouped Anchors and Plates of Synapta . . 



14. Heliopelta euleri. Diatom 



15. Diatoms from Cuxhaven 



16. Cluster Cups ; ^Ecidium ...... 



(vii) 



