140 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 



PLATE 17 



Fig. 1-5. Lejolisia colombiana Tayl. Fig. 1-2, Tetrasporangial branches, X 

 100 (after Taylor); Fig. 3-4, Spermatangial branches, 100 (after 

 Taylor); Fig. 5, a cystocarp, X 150. 



Fig. 6. Ceramium affine S. & G. A tetrasporangial branch, X 240. 



Fig. 7. Pleonosporium rhizoides sp. nov. Lower part of an axis of the type 

 collection, showing abundant dascending rhizoids, X 33. 



Fig. 8. Ceramium camouii Daws. Part of a tetrasporangial axis showing 

 three closed involucres (compare with PI. 18, fig. 1), X 200. 



Fig. 9-10. Ceramium affine var. peninsularis Daws. Fig. 9, Part of a sterile 

 axis, X 225; Fig. 10, a tetrasporangial node, X 330. 



