26 



ADIANTUM. 



52. Gametophyte. With the aid of a hand lens draw an enlarged view of the under 

 surface of a prothallus, showing : rhizoids ; cushion ; antheridia ; archegonia, 



53. Sexual Reproduction. Mount a prothallus and draw under the high power : 

 antheridia with contained spermatozoids ; archegonia with venter, neck, canal cells, and 

 ovum. 



54. Sexual Reproduction. Sketch the demonstration specimen of a young sporo- 

 phyte attached to a prothallus, showing : foot ; stem ; leaf ; primary root. 



