408 ALLAX HANCOCK PACIFIC EXPEDITIONS VOL. 12 



PLATE 46 



Fig. 1. Amphiroa minutissima. A portion of a small clump 

 viewed from above, showing the character of the 

 branching. In several areas, especially toward the left, 

 one may note the short segments of which the branches 

 are composed. The conceptacles are mostly on the con- 

 cealed side of the branches, but a few show just above 

 the center and one very typical row toward the right 

 side. The fragments toward the left-hand margin are 

 ^, c' '5 of another species. Costa Rica, x 83. 



Fig. 2. Laurencia 'voragina. Portions of a clump, photographed 

 from alcohol-preserved material, to show the form and 

 arrangement of the branches. Mexico, x 2.4. 



