448 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



PLATE 66 



Fig. 1. Prionitis filiformis v. drlicalitla. A portion of a large 

 tuft showing regular pinnate branching. I. Cerros. x 0.8. 



Figs. 2-6. Hcrpophyllon coalfscfiis. Portions of several plants are 

 shown. Fig. 2 sho^vs a young peltate individual from 

 below, the holdfast \vith attached whitish detritus turned 

 toward the right. Fig. 3 shows another young, some- 

 what funnel-shaped peltate specimen from the side. 

 Figs. 4-6 show groups of older individuals which have 

 coalesced laterally. The\ are photographed from below, 

 the holdfasts project upward, and are recognizable by 

 the attached whitish coralline sand. Toward the upper 

 right-hand corner of fig. 5, one member of the group 

 shows clearly in side view, attached to the others by 

 part of its margin. This photograph was made from 

 dried specimens. The preserved material, having become 

 entirely decolorized, did not have a natural appearance 

 when photographed, although it served well for accurate 

 study of the form and structure of this little-known 

 species. I. Santa Maria, x 0.9. 



