

if ( i V 





^y4lm MV?ft/ 



[ji/Vvu'^i vj' 



^0M^ f0) J, --AjiAi:^ 







Fig. 76. — BoiigaiivtnlL-a raiiiosa. 



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

 root-like organ of attachment. 



B, a portion of the same magnified, showing the brancheri stem bearing hydranths 

 {hyd) and medusa; {>/ied), one of the latter nearly mature, the others im- 

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

 stome {hyP), and contains an enteric cavity {cnt. can) continuous with a narrow 

 canal {ent. caz'') in the stem. The stem is covered by a cuticle icri). 



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

 velum (7.-), manubrium {iiinb), radial (rae/.c) and circular {ci'r. c) canals, an(l 

 eye-spots (oc). (From Parker's Bioloffv, after Allman.) 



Pkact. Zool X 



