272 DESCRIPTION OF [Polygastrica. 



selves by their strong branches, but having the charac- 

 ters of Carchesium and Opercularia, as respects the pre- 

 sence of globular bodies in the axillae of the branches. 

 When full grown, all the animalcules free themselves from 

 the pedicle, which afterwards withers and disappears. 

 Found upon Ceratophyllum. Size 1 -430th ; tree l-4th ; 

 stalk l-4th the thickness of the body. 



419. ZOOTHAMNIUM niveum. The Abyssinian Zootham- 

 nium. Branches short, alternate, and almost verticillate ; 

 bodies oblong, white, clustered at the ends of the branches ; 

 some are round and attached to the trunk ; the branches 

 are filiform, the lower ones often deserted, while the upper 

 bear clusters of club-shaped little bodies, rounded ante- 

 riorly. Size 1-2 10th. 



