392 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



PLATE 47 



Fig. 1. Polyneurella Hancockii, habit of the type, x 1. 



Fig. 2. Polyneurella Hancockii, detail of apical cell, x 450. 



Fig. 3. Sorella pinnata, branching habit, x 11. 



Fig. 4. Sorella pinnata, detail of frond apex to show apical cell di- 

 visions, X 300. 



Fig. 5. Myriogramme divaricata, portion of a tetrasporic frond of 

 the type, x 2. 



Fig. 6. Grinnellia lanceolata, habit of a specimen of the type col- 

 lection, X 4.5. 



