IX 



LIST OF ILLUSTEATIONS. 



PLATES. 



1. Various species of Asplanchna. 



2. Diaschiza veiitr'ipes n. sp. and Cathyptia ligona n. sp. 

 3 and 4. Stridulating organs of aquatic Rhynchota. 



5. Pkmacerciis jyyriformis n. sp. 



6. Ephippium of Bosviina. 



7. Micros tructu re of metals and alloys. 



8. Hijclra and the surface-film ; and Triarthra hracliiata n. sp. 



9. Diglena rostrata n. sp. 



10, 11 and 12. Ephippia of Lynceid Entomostraca. 

 13 and 14. Legs of Diptera. 



15. Ecj)olus jjapillosus n. sp. 



16. Cymhalopora hulloides (d'Orbigny). 



17 and 18. Male Rotifers and resting eggs. 



19. Teeth of Flies. 



20. Drepanidotaenia termirostris. 



21. Zootha.mnium geniculatnm n. sp. 



22. Male organs of Flies (Scatophaga). 



23. Cell division of Surirella calcarata. 



24. Details of five species of British Cladocera. 



25. Chelifer sculpturatns n. sp. 



26. Male Rotifers. 



27. New Philodinae. 



28. Cavities in Minerals. 



FIGUEES IN THE TEXT. 



Page 17. Diagrams illustrating the path of light-rays through Diatom 

 perforations. 

 19. Diagrammatic sections of valves of Actinocyclus Ralfsii, 



62. Stigmatic organ of nymph of Ornitlwdorus megnini. 



63. Diffraction Spectra Ocular. 

 65, Water-mite larvae attached to a small fish. 

 68 to 73. Various types of portable microscopes. 



114 and 116. Diagrams illustrating the path of light-rays through 

 Diatom perforations. 



120. Caviptomyces melanoiJus. 



121. Comjjsomyces verticillatus. 

 123. Metopidia solidus (^ . 



h 



