in] GREEN CELLS OF CONVOLUTA 87 



glands which occur in the surface-tissues of the body 

 of the animal. 



The green pigment of C. roscoffensis is chlorophyll, 

 identical in its spectroscopic properties with that 

 contained in the green tissues of plants. Moreover, 



Fig. 18. Yellow-brown cells of Convoluta paradoxa. I. As seen in an 

 animal some hours after capture. II. As seen immediately after 

 capture. The spherical masses lying in the cells and also outside 

 them represent the fat-globules referred to on pp. 89 and 91. 



The shaded oval bodies at the periphery of the cells represent 

 chloroplasts. 



as Geddes (1879) has demonstrated, the green cells 

 of C. roscoffensis are capable of photosynthesis. When 

 the animals are exposed to light, they decompose 

 carbon-dioxide, give off oxygen, and manufacture 

 carbohydrates, the excess of which is stored in the 

 chloroplast in the form of starch. 



That the starch which occurs in the green cells 



