2 Campbell ’ — Studies in some East Indian Hepaticae . 
The results of these investigations show that the reproductive structures 
differ quite as much from those of the typical Liverworts as do the vege- 
tative characters. Our knowledge of the development of the reproductive 
organs and sporophyte of Haplomitrium are at present too incomplete to 
make possible a satisfactory comparison with these points in Calobryum . 
Leitgeb, 1 as a result of his studies on Haplomitrium , was unable to dis- 
cover any near relationship with any of the other Hepaticae. 
The general aspect of Calobryum (PI. I, Figs. 1-4) is quite different from 
that of an ordinary Liverwort, since the strongly dorsiventral character, 
almost universal among Liverworts, is either quite absent, or but slightly 
developed. The leafy shoot is usually quite upright, and the leaves 
arranged radially about the axis. There are, however, three rows of leaves 
A 
Text-fig. i. a, Cross-section of a leafy shoot of Calobryum ( x 56) ; B, a glandular hair ( x 420). 
as in the ordinary foliose Liverworts, and very often the leaves of one row are 
smaller than the others and may be compared with the amphigastria or 
ventral leaves of the familiar leafy genera. Calobryum very much resembles 
a true moss, such as some of the larger species of Mnium , this resem- 
blance being emphasized, especially in the male plants, by the flattened 
rosette of large leaves surrounding the terminal disc of antheridia. 
The leafy shoots arise from extensively branching prostrate stems 
forming a sort of rhizome. The branches of the rhizome are cylindrical, 
and quite destitute of rhizoids, but there may be developed short muci- 
lage-secreting hairs, which also occur upon other portions of the plant. 
Some of the branches of the rhizome begin to develop leaves near the 
apex, turn upward to the light, and soon assume the character of leafy 
1 Leitgeb, H. : Untersuchungen iiber die Lebermoose, ii, 1875. 
