Fig. 53. — Bougainvillea 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 (tiied), 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 (f«). 



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

 tentacles (/), velum (v), manubrium {mnb), radial {rod. c) and circular 

 {cir. c) canals, and eye-spots {pc). (After Allman.) 



