Howe: ALGAE OF BERMUDA AND THE BAHAMAS 353 
Ficures 11-14. Pithophora heterospora Howe & Hervey. 11, a plant 
with spores in cauloid part and with one rhizoid from a median cauloid part; 
12, a plant in which the basal part, with spores characteristic of rhizoid parts, 
has the direction of growth of the cauloid part; 13, a rhizoid part, with spores, 
14, the apical portion of a cauloid branch, showing one terminal and one 
intercalary spore. Figures 11 and 12 are enlarged 11 diameters; figures 13 
and 14, 28 diameters. \ 
