50 ZOOLOGY 
Tubularia indivise is a marine colonial Hydromedusan 
borne on a branching anastomosing stolon attached to sub- 
Fia. 38.—A colony of Tubularia 
indivisa. After Allman 
(natural size). 
. Cireumoral tentacles, 
. Aboral row of tentacles. 
. Mouth. 
. Blastostyle. 
. Hydrocaulus. 
Oo oO fF CO ND HE 
. Hydrorhiza. 
merged objects. At intervals the stolon sends up straight 
unbranched stems, each of which terminates in a hydroid person, 
generally termed a hydranth. The branching stolon may be: 
