IV 



PHYLUM CGELENTERATA 



103 



differs in different forms, more particularly as regards the 

 umbrella. There is always a manubrium, with gastric 

 t 



FIG. 47. Bougainvillea ramosa. A, entire colony, natural size; B, portion of the 

 same magnified ; C, immature medusa ; dr. c, circular canal ; cu, cuticle or 

 perisarc ; ent. cav, enteric cavity ; hyd, polype or hydranth ; hyp, hypostome or 

 manubrium ; med, medusa; muo, manubrium ; rad. c, radial canal ; t, tentacle ; 

 v, velum. (From Parker's Biology, after Allman.) This is closely allied to the 

 New England B. super cilians. 



