NUTRITION IN MEDUSii:. 



79 



base of the hemisphere presented in Fig. 249. On 

 the other hand, the dotted Hne v, v, in Fig. 249, is 

 that along which the vertical section of the same 

 animal, represented in Fig. 252, was made ; four of 



the arms (a, a, a, a) descending from the pedicle, 

 being left attached to it. In these arms, or ten- 

 tacula, may be seen the canals, (marked by the 

 dark lines, c, c, c), which arise from numerous ori- 

 fices in the extremities and fringed surface of the 

 tentacula, and which, gradually uniting, like the 

 roots of a plant, converge towards the centre of the 

 pedicle, and terminate by a common tube, which 

 may be considered as the oesophagus (o), in one 

 large central cavity, or stomach (s), situated in the 

 upper part of the cupola. The section of this ceso- 



