Fig. 103. — A, Longitudinal section of the young sporogonium of Pletiridunn snbulatuin, X 80 ; B, 

 part of the same, X 6co ; sp, archesporium ; C, young embryo of Phascum citspidattim, optical 

 section, X 175 ; D, cross-section of an older embryo of the same, X 350 ; jr/S, archesporium ; E, longi- 

 tudinal section of the central part of the young sporogonium of Epheinemm phascoides, X35C ; 

 sp, archesporium. C, D, after Kienitz-Gerloff ; E, after Mliller. 



