FIG. 53. Bougainvilha ramosa. 



A, a complete living colony of the natural size, showing the branched 

 stem and root-like organ of attachment. 



B, a portion of the same magnified, showing the branched stem bear- 

 ing hydranths (hyd) and medusae (med), one of the latter nearly mature, 

 the others undeveloped : each hydranth has a circlet of tentacles (/) 

 surrounding a hypostome (hyp], and contains an enteric cavity (ent. cav} 

 continuous with a narrow canal (ent. cav') in the stem. The stem is 

 covered by a cuticle (<:). 



c, a medusa after liberation from the colony, showing the bell with 

 tentacles (/), velum (v), manubrium (ninti), radial (rad. c) and circular 

 (dr. c) canals, and eye-spots (oc). (After Allman.) 



