416 ALLAY HANCOCK PACIFIC EXPEDITIONS VOL. 12 



PLATE 50 



Figs. 1, 2. A mf^hiroa peruana. T\vo portions of large clumps show- 

 ing dense branching, the form of the segments, and the 

 striking black nodes between the calcified segments. I. 

 Santa Maria, x 1.1. 



