158 JULIAN S. HUXLEV^ 



where there is plenty of food that they can absorb, and least 

 chance of their being carried away to the exterior. 



Sometimes the parasites, instead of having their typical 

 straight or gently-curved form (fig. 1) lie coiled and con- 



Text-fig. 1. 



A 



B. - 



I. 



An associated couple of G a ii y m e d e s, showing the cup-individual 

 (B) gi-asping in its cup the ball (b) of the other associate (A) 

 The ball end of B is abnormal. The cup end of A has a large 

 vacuole within it. The bodies are slightlj' dilated round the 

 nucleus. 



torted against the intestinal wall ; and when this is so, 

 many are usually congregated in patches, and are stuck 

 togethei-, presumably by the coagulated secretion of the 

 endodermic cells. What are the I'easons for this condition I 

 could not discover. 



