Fig. 76. — 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 bearing hydranths 

 ihyd) and medusse (med)j one of the latter nearly mature, the others im- 

 mature ; each hydranth has a circlet of tentacles (^) surrounding a hypo- 

 stome {kyp\ and contains an enteric cavity {e^it. cav) continuous with a narrow 

 canal (ent. cav') in the stem. The stem is covered by a cuticle {c7t). 



C, a medusa after liberation from the colony, showing the bell with tentacles (/), 

 velum (w), manubrium (j)inb\ radial {rod. c) and circular {cir. c) canals, and 

 eye-spots (fic). (From Parker's Biology, after Allman.) 



Pract. Zool X 



