LOPHOPUS. 167 
lies between mouth and anus just under the epistome. It gives off 
a ring round the cesophagus and other branches. 
In allied species the trunk-ccelom opens by paired ciliated canals 
to the exterior near the anus. 
Fig. 96.—View oF ENTIRE CoLony oF LoPHorus. 
(After ALLMAN.) 
Lophopus is an annual and dies down on the approach of winter. 
It produces, however, before this event, a number of encapsuled_ buds 
called statoblasts which give rise to a fresh colony in spring. These 
are not found in its marine allies. (See page 61.) The colony is 
produced by asexual budding from a single individual, hence metagenesis 
occurs as in hydroid zoophytes. 
