io Campbell . — Studies in some East Indian Hepaticae . 
no part in the future growth of the embryo. The divisions in the upper 
segments were decidedly irregular, and it was impossible to judge of the 
relation of these early divisions to the structures of the older sporophyte. 
No stages were found between this very early one and those in which 
the different regions of the sporophyte were clearly differentiated. The 
Text-fig. 6. A, Two sections of a young embryo ( x 280) ; B, an older embryo, enclosed in the 
calyptra, cal. ( X 38) ; C, apex of the embryo, shown in B (x 280) ; D, upper part of calyptra, and 
young sporophyte ( x 66) ; E, longitudinal section of young sporophyte (, x about 30) ; F, the foot 
(x 66) ; g, young spore mother-cells and elater (x 425); H, two young spore-tetrads; only one 
nucleus in each tetrad is normal., 
young sporophyte (Text-fig. 6 , E) is elongated, the basal portion consisting 
of a pointed foot which merges insensibly into the seta. The capsule is at 
this stage slightly enlarged and somewhat pointed. The sporogenous tissue 
is clearly defined, and is bounded by a single layer of wall-cells, in which 
respect Calobryum resembles the Marchantiales or Sphaerocarpales, rather 
than the Jungermanniales, where the capsule wall is always composed of 
