vu 



LIST OP ILLUSTEATIONS. 



PLATES, 



1. Choanoflagellata. 



2. Scepanotrocha gen. et spp. novae. 



3. African species of Volvox. 



4. Cassidulina spp. novae. 



5. Hydrachnidae from East African Lakes. 



6. Hymenolepis upsilon sp. nov. 



7. New Rotifers. 



8. Tardigrada. 

 9, 10. Rhizopods from Sierra Leone. 



11. Spermatozoa of the Blow- fly and Flea. 



12. Callidina spp. novae. 



13. Rotifera. 



14-21. Lagenae of the South- West Pacific Ocean. 



22. Illustrating Messrs. Merlin and Nelson's Notes. 



23. Botryllus spp. 



24. Proales {Notommata) gigantea Glascott. 



:<^^ 



0re..^ 



// 



FIGURES IN THE TEXT. 



Page 122. A sliding nose-piece for use in Stereo-photomicrography. 

 245. Plan and elevation of " haematocrit " head, 

 291. The iaiage of the flame in correct and incorrect illumination. 

 319. An improved compound microscope by James Mann. 

 476. Diagram dark-ground illumination. 

 47 <. ,, ,, ,, 



515. An aplanatic spot-lens. 



516. Filament from Coscinodiscus. 

 ,, Filament from Biddulphia. 



