Tab. TX. 



Fig. 68, Lygodiusi. — a, portion of barren frond ; h, d, portions 

 of fertile frond j c, § Lygodictyon, barren portion. 



Fig. 69. Angiopteris. — a, cluster of capsules ; b, pair of capsules 

 and section of frond ; c, single detached capsule. 



Fig. 70. Marattia. — a, h, portions of frond, with a single multi- 

 locular receptacle ; c, vertical section of receptacle. 



Fig. 71. Dan^ea. — a, portion of fertile frond ; h, section of recep- 

 tacle ; c, spores. 



Fig. 72. Kaulfussia. — a, portion of fertile frond ; b, c, detached 

 receptacles ; d, spores. 



Fig. 73. Ophioglossum. — a, complete plant j b, barren portion.; 

 c, fertile poi'tion ; d. spores. 



Fig. 74. Helmintho.stachys. — a, nearly complete plant; b, portion 

 of barren frond ; c, d, portions of fertile frond. 



Fig. 75. BoTRYCHiuM. — a, complete plant ; 6, barren portion ; 

 c, fertile portion ; d, spovea. 



