IV. 



THE ANTHOCEROTES 



147 



The archegonium of Dendroceros is much like that of the 

 other genera, perhaps more nearly approaching that -of Antho- 

 ceros. 



The embryo of Dendroceros resembles more nearly that of 

 Anthoceros than it does Notothylas. The archesporium is less 



a. 



FIG. 78. Dendroceros Bretttelii. A, Thallus with sporophyte attached, X4J B, apex 

 of the thallus X6oo; C, archegonium, X6oo; D, E, young antheridia, X6oo. 



developed than in either species of Anthoceros 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- 



