482 G.. H. PARKER 
3 4 
Fig. 1 A Renilla with a shallow unilateral incision in the rachis. The course 
of the rachidial wave is indicated by arrows. 
Fig. 2 A Renilla with a deep unilateral incision in the rachis. The course of 
the rachidial wave is indicated by arrows. 
Fig. 3 A Renilla bisected except for the distal end of the peduncle. The 
synchronous bilateral, rachidial waves are indicated by arrows. 
Fig.4 A Renilla bisected except for the apical margin. The bilateral 
rachidial waves, not necessarily synchronous, are indicated by arrows. 
Fig. 5 A Renilla rachis devoid of one lobe and the peduncle. The course of 
the rachidial wave is indicated by arrows. 
