122 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 



PLATE 8 



Fig. 1-2. Callithamnion Icjolisea Farlow. Fig. 1. A cystocarp terminating an 

 erect branch X 400; Fig. 2, A capitate, terminal spermatangiai 

 cluster, X 400. 



Fig. 3-4. Callithamnion breviramosum Gard. Fig. 3, Mid-portion of a tetras- 

 porangial plant. X 136; Fig. 4, Spermantangial tufts. 



Fig. 5. Callithamnion endovaginum S. & G. Cystocarpic and tetrasporangial 

 plants endophytic on Grateloupia, X 135. 



