PLATE 27. 



Odonthalia semicostata (Mertens) J. Agardh. 



46. Habit of a pinnule bearing eystooarps. Such pinnules are always 



more or less eroded. (X H) 



47. Portion of a cystoearpic glomerule. ( ;< 5) 



48. Portion of a cystoearpic glomerule. ( :< 5) 



49. Portion of a tetrasporic glomerule. ( ■■' 10) 



Odonthalia floccosa (Esper) Falkenberg. 



50. Pinna of an antheridial plant, showing the aggregation of the 



antheridial branchlets in a terminal glomerule. (*5) 



Odonthalia Lyallii (Harvey) J. Agardh. 



51. Portion of a tetrasporic plant, (nat. size) 



52. Tetrasporic pinnule. C'5) 



53. Portion of a cystoearpic pinna. ( ' 3) 



All the figures were drawn by H. N. Bagley, under the direction of 

 W. A. Setchell. 



L41RJ 



