Plate XXXI; Figures 207 to 209. 



Fig. 207. Chora sp. ( ? ) Shield of antheri- 



dium ( 125 diameters) . . . page 69 



Fig. 208. Chora sp. (?) A portion of the 



plant, natural size .... " " 



Fig. 209. Chora sp. (?). a, antheridium; 



b, oogonium 1 50 diameters) . . " " 



