76 



PLANT-ANIMALS 



[CH. 



and puzzling objects (Frontispiece and Fig. 15). 

 Puzzling because, whilst they seem to be just as 

 much integral parts of the bodies of the animals as 

 any other tissue-elements, they have nevertheless 

 a foreign and plant-like appearance. So plant-like 



OT-. 



Diat* 



Fig. 14. A young Convoluta roscoffensis. GC = green cells. Diat. 

 and R = remains of diatoms ingested and digested. OT = otocyst. 



indeed is the aspect of C. roscoffensis as seen under 

 the microscope, that a botanist might well be excused 

 for mistaking it for a fragment of a leaf, endowed 

 with an uncanny kind of movement. 



