IV. 



THE ANTIIOCEROTES 



U7 



The archegonium of Dcndroceros is much hke that of the 

 other genera, perhaps more nearly approaching that of Antho- 

 ceros. 



The embryo of Dcndroceros resembles more nearly that of 

 Anthoccros than it does Notofhylas. The archesporium is less 



A 



a. 



D. 



b. 



Fig. 78. — Dcndroceros Brexitelii. A, Thallus with sporophyte attached, X4; B. apex 

 of the thallus X600; C, archegonium, X600; D, E, young antheridia, X600. 



developed than in either species of Anthoccros that were studied 

 by the writer, showing only an imperfect division into two lay- 

 ers when seen in section. No stomata are developed in the epi- 



