600 
Bryophyten. 
chromatophores. The foot is large and possesses extensively branched, 
rhizoid-like outgrowthes. Numerous rhizoids develop from the thallus 
beneath the insertion of a sporogonium. The spores germinate 
without forming a germ tube. Megaceros shows points of contact 
with all the other three genera. W. H, Lang. 
Campbell, D. H., Studies on some Javanese Anthocevotaceae. II» 
(Ann. Botany. XXII. p. 91. Plates IX and X. 1908.) 
A description is given of the structure of two species ot 
Dendroceros and one of Notothylas collected in Java. The taller is 
assumed to be N. javanicus , Gottsche and one of the two species of 
Dendroceros may perhaps be D. javanicus , N. ab E. They are not 
however definitely determined the larger form from a higher 
elevation being referred to as species A, the smaller form as species B. 
The general structure, the apical growth of the thallus and the 
sexual organs agreed in the two species of Dendroceros with what is 
known of other species. The development of the embryo is described 
and it is shown that the archesporial layer extends quite to the 
transverse walls that marks the upper limit of the foot. In this 
respect Dendroceros closely resembles Megaceros. The sporogenous 
layer except above the apex of the columella remains one cell thick. 
Segmentation of the spores begins within the sporogonium. 
The thallus of the species of Notothylas studied, “which is # 
presumabely N. javanicus is solid, having no mucilage cavities. 
The archegonia and antheridia (of which there were usually four 
in each cavity) resemble those of N. orbicidaris. The first division 
wall in the embryo was longitudinal and the embryo becomes 
divided into three tiers by transverse walls. The columella and 
archesporium are differentiated as in Anthoceros in the uppermost 
tier. The archesporium is of amphithecial origin. The columella is 
less developed than in N. orbicularis , most of the smaller ones 
showing only four cells in cross section. In some specimens only 
three cells were seen in cross section and presumably the cell of 
one quadrant had contributed to the sporogenous tissue. In no 
specimen examined was the columella entirely absent. Above the 
summit of the columella, which is not always very clearly defi- 
ned in the upper region, the sporogenous tissue divides rapidly 
and forms a large mass. The author concludes that in normal cases, 
at least, the sporogonium of N. javanicus develops in precisely the 
same way as that of N. orbicidaris or the other Anthocerotaceae. 
In conclusion the affinities of the genera of Anthocerotaceae and 
the relationship of the group to other Liverworts are discussed 
briefly. A comparison of the sporogonium of Notothylas , which the 
author regards as “without doubt the simplest and probably the 
most primitive of the Anthocerotaceae ,” is suggested with Sphaero- 
carpus or perhaps better with Cyathodium. The relationship is 
certainly remote either with the Marchantiales or the Jungermanniales 
and the group is probably best regarded as sufficientlv distinct from 
the true Hepaticae to form a special dass Anthocerotes as has been 
suggested by Hax. W. H. Lang. 
Evans, A. W„ Leucolejeunea, a new genus of Hepaticae. (Torreya. 
VII. p. 223—229. December, 1907; issued January 15, 1908.) 
The new genus Leucolejeunea with Jungermannia clypeata 
