LIST OF ILLUSTRATIONS 



IX 



of a spher 



FIG. 



53. Annular chromosomes of mole-cricket (Wilson, after vom Rath) . 



54-56. Diagrams illustrating a hypothetic field of force in caryokinesis 



(Prof. W. Peddie) 



57. An artificial figure of caryokinesis (Leduc) 



58. A segmented egg of Cerebratidus (Prenant, after Coe) 



59. Diagram of a field of force with two like poles 



60. A budding yeast-cell ...... 



61. The roulettes of the conic sections .... 



62. Mode of development of an unduloid from a cylindrical tube 

 63-65. Cylindrical, unduloid, nodoid and catenoid oil-globules (Plateau) 



Diagram of the nodoid, or elastic curve 



Diagram of a cylinder capped by the corresponding portion 



A liquid cylinder breaking up into spheres 



The same phenomenon in a protoplasmic cell of Trianea 



Some phases of a splash (A. M. Worthington) 



A breaking wave (do.) ...... 



The calycles of some campanularian zoophytes 



A flagellate monad, Disiigma proteiis (Saville Kent) 



Nocliluca miliaris, diagrammatic .... 



Various species of Vorticella (Saville Kent and others) 



Various species of Salpingoeca (do.) 



Species of Tintinnus, Dinobryon and Codonella (do.) 



The tube or cup of Vaginicola ... 



The same of Folliculina ...... 



Trachelophyllum (Wveszniowski) .... 



Trichodina j)e,diculus . . ... 



Dinenympha gracilis (Leidy) ..... 



A "collar-cell" of Codosiga ..... 



Various species of Lagtna (Brady) . 



Hanging drops, to illustrate the unduloid form (C. R. Darling) 



Diagram of a fluted cylinder .... 



Nodosaria scalar i.? (Brady) .... 



Fluted and pleated gonangia of certain Campanularians (AUman) 

 Various species of Nodosaria, Sagrina and Rheophax (Brady) . 

 Trypanosoma tineae and Spirochaeta anodonfae, to shew undulatin 



membranes (Minchin and Fantham) .... 



Some species of Tricliomastix and Trichowonas (Kofoid) 

 Herpetomonas assuming the undulatory membrane of a Trypanosome 



(D. L. Mackinnon) 



Diagram of a human blood-corpuscle 



Sperm-cells of decapod crustacea, Inachus and Galathea (Koltzoff) 



The same, in saline solutions of varying density (do.) 



A sperm-cell of Dromia (do.) .....•• 



Chondriosomes in cells of kidney and pancreas (Barratt and Mathews 



Adsorptive concentration of potassium salts in various plant-cell 



(Macallum) ......••• 



99-101. Equilibrium of surface-tension in a floating drop 



102. Plateau's "bourrelet" in plant-cells; diagrammatic (Berthold) 



103. Parenchyma of maize, shewing the same phenomenon . 



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