226 H. J. Clark on Anthophysa Miillert. 
always toward the pedicel of the colony. One is forcibly re- 
minded by this of the systematic relation of some of the flowers 
of Labiate, with their stamens projecting far beyond the upper 
lip of the corolla. The globose heads of the Menthe are partic- 
ularly good examples for illustrating this similitude. 
cule possesses are preéminently prehensile in character; and 
their apparent appropriation for the office of propulsion, when a 
colony breaks loose from its attachment, I can scarcely doubt is 
an accidental one, inasmuch as the arcuate cilium continues its 
spasmodic twitching without any apparent deviation from its 
usual mode of action. 
the mouth than the latter. It is highly flexible and vibrates 
with great rapidity in what appears to be a gyratory manner. 
_ Lhe mouth.—This organ is never visible except when food is 
rex through it. It then may be seen that it lies close to the 
which acts as a sort of lip by curving over the introcep' 
