356 ALLAX HAN'COCK PACIFIC EXPEDITION'S VOL. 12 



PLATE 20 



Figs. 1,2. Eisi-nia t/alapaijensis. Fig. 1. A young plant with hold- 

 fast, short slender stem, and with the central priinary 

 blade but moderately eroded at the tip, the basal lateral 

 lobes not yet dominating the growth. Fig. 2. A consider- 

 ably older fertile plant without holdfast, but with the 

 short stem bifurcate at the top and with the first sec- 

 ondary blades well developed, showing large pinnate 

 serrate lobes (the tips broken off) and a prominent 

 median sorus area. I. Santa Maria, x 3.0. 



