162 



INDEX 



Convoluta roscoffensis (cont.) : 

 Digestive system, 11 

 Eggs and egg-capsules, 13, 56 ; 



periodicity of laying of, 26 

 Excretory organs (absence of), 



147 



Eyes, 9 



Feeding habits of, 77, 81, 97 

 General aspect, 5 

 Gravi-perception, 10, 39 

 Green cells of, 75, 84, 105; 



algal nature of, 118; life 



history of, 132; origin, 108 

 Gullet, 11 

 Habitat, 7, 14, 18 

 Light-rigor, 60 

 Mouth, 11 

 Nucleus, 110 



Nuclear degeneration, 112 

 Otocyst, 9 

 Periodicity of ascent, 62; of 



egg-laying, 26 

 Photosynthesis by the green 



cells of, 81, 87 

 Phototonic effect of stimulation, 



59 



Phototonus, 59 

 Phototropism, 41, 52 

 Keaction to monochromatic 



light, 54 



Eegeneration of, 27 

 Kesponse to vibration, 15 

 Ehythmic ascent and descent, 



19, 62 



Koscoffensis zone, 17 

 Simultaneous stimuli, 44, 45 

 Size, 16 



Starch in green cells, 87 

 Starvation, resistance to, 94 

 Tidal rhythm, 63, 67 

 Tonic influence of light, '67 

 Tropistic response to light, 41 



Convoluta roscoffensis (cont.) : 



Vacuoles, 11 



Vibration, response to, 62, 



67 

 Copepods, tropism of, 69 



Dictyota dichotoma, 34 

 Directive stimuli, 40 



Echinocardium sp., 100 

 Elysia sp., 100 

 Eudendrium racemosum, 33 

 Euglena viridis, 103 

 Eye-spot, 102, 110 



Flagella, 124 

 Fungi, 156 



Geddes, P., 87 



Goebel, K., 33 



Gravi-perception (by roots), 38 



Green cells of animals, 82, 

 100 



Green cells of C. roscoffensis, 

 algal nature of, 128; colourless 

 phase of, 126; cultivation of, 

 115 ; structure and life history, 

 110, 123 



Green light, and marine organ- 

 isms, 54 



Haberlandt, G., 105 

 Hering, Prof. E., 49 

 Hippolyte varians, 47 

 Hormones, 135 

 Hydra viridis, 100 



Ivy, 32 



Lankester, Sir Bay, 114 

 Leucoplast, 105, 109 

 Lichens, 107 



