The Message of Science. 29 



good. In siphonophora, as, indeed, in hundreds of other 

 instances, the beginnings of multicellular mind are appar- 

 ent. That is to say, there is present not only the cell 

 intelligence that which pertains to all cells but that 

 larger intelligence which comes into existence from the 

 consentience of the entire colony the pooling of the 

 separate cell sentiences in one larger intelligence. 



This habit among protozoons of colonizing however 

 it originated opened the way to metazoons. Often the 

 colony grows up around one mother cell, whose offspring 

 instead of dispersing remain loosely attached together. 

 Of such agglomerations anthrophysa vegetans is a good 

 instance. 



In other instances the envelope, or cuticle, of the 

 mother cell expands and enlarges, forming a sac which 

 contains the entire colony for a considerable time, till the 

 reproductive power of the parent cell is exhausted. 

 Eventually the sac bursts and the group disperses. Many 

 of the flagellates exhibit this phenomenon, the parent 

 organism continuing to move about after becoming a 

 colony instead of a single cell. 



In. gonium pectorale, a volvocine of stagnant fresh waters, 

 a colony of sixteen offspring cells adhere laterally to each 

 other, in the form of a minute, rectangular plaque of a 

 light green color. Pandorina, on the other hand, gives 

 birth to either sixteen or thirty-two offspring, which live 

 for a time in a species of globular colony, inside a thin 



