564 INTRODUCTION TO CRYPTOGAMIC BOTANY. 



other those of mosses, though the nature of the vascular tissue, 

 the sporesacs, and other points seem to indicate their mutual 

 affinity. Chorionopteris, referred by Corda to ferns, and sup- 

 posed to be allied to Gleichenia, is another anomalous Cryp- 

 togam, whose true affinities can scarcely be determined without 

 better materials. 



