114 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 26 



PLATE 4 



(all after Kylin) 



Fig. 1. Platythamnion villosum Kylin. A spermatangial branch, X 122. 



Fig. 2-3. Platythamion pectinatum Kylin. Fig. 2, part of a tetrasporangial 

 plant, X 87; Fig. 3, a spermatangial branch, X 200. 



Fig. 4. Platythamnion heteromorphum J. Ag. Part of a sterile axis, X 85. 



Fig. 5-7. Antithamnion glanduliferum Kylin. Fig. 5-6, tetrasporangial branch- 

 let, X 112; Fig. 7, mid-part of a sterile plant, X 35. 



Fig. 8-9. Antithamnion pacificum (Harv.) Kylin, Fig. 8, mid-part of a sterile 

 plant, X 36; Fig. 9 a tetrasporangial branch, X 63. 



