262 ALDROVANDA VESICULOSA. [Cuap. XIV. 
processes are formed of very delicate membrane lined with a, 
layer of protoplasm ; and they sometimes contain aggregated. 
globules of hyaline matter. Two of the slightly diverging 
arms are directed towards the circumference, and two 
towards the midrib, forming together a sort of Greek cross. 
Occasionally two of the arms are replaced by one, and then 
Fic. 13. 
(Aldrovanda vesicutosa.); 
Upper figure, whorl of leaves (from Prof. Cohn.) 
Lewer figure, leaf pressed fat open and greatly enlarged. 
the projection is trifid. We shall see in a future chapter 
that these projections curiously resemble those found within 
the bladders of Utricularia, more especially of Utricularia 
montana, although this genus is not related to Aldrovanda. _ 
A narrow rim of the broad flat exterior part of each lobe is 
