Figure 1. Terminal branches of Halimeda showing (A) unpigmented 

 tips as they appear at about 0000 hr, (B) expanding but 

 unpigmented tips as they appear at about 0400 hr (older 

 terminal segments may produce 1, 2, or occasionally 3 new 

 segments), and (C) an older segment whose developing tips 

 have each been bitten off. 



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