28 
THE SEAWEEDS 
articulated; the branches constricted at the origin, not articulated at the 
base. It is not clear on what grounds Reinbold made his decision, and 1 
prefer to leave the species in Cladophora . 
However I am convinced, from plants collected at Encounter Bay by 
Dr. J. B. Cleland, that Siphonocladus does occur. More material is 
necessary for specific determinations. 
Fig. 10. — (Jl.&dophora volonioides. 
Cladophora confonnis Reinbold. 
Reinbold considered this species to be distinguished from all others by 
the cells being of the same diameter from base to apex of the plant, while 
in the rest the cells of successive branches become narrower and narrower. 
