470 Campbell. — Studies on some Javanese A nthocerotaceae. 1 . 
possibly more, and A. giganteus is also characterized by its very long 
sporophyte. Stephani has described a species of Anthoceros , A. Stahlii , 
which evidently belongs to the same group as the species here described. 
The specimens were collected on Mount Gedeh, where the writer also 
collected much of his material. The original description was not accessible 
to the writer, but through the kindness of Dr. Howe a copy of the de- 
scription was sent him. 
The Tjibodas form, or at least the commonest one, agrees in many 
respects with Stephani’s description of A. Stahlii , and may possibly be 
the same, but the thallus in the writer’s specimens is very much thicker, 
and the spores and especially the elaters much larger than Stephani 
describes for A. Stahlii. For this species, the name Megaceros Tjibodensis 
is proposed. The species from Mount Salak we shall call M. Salakensis. 
The important points of difference between Megaceros and Anthoceros 
are the multiple chromatophores of the former, the absence of stomata from 
the sporogonium, the solitary antheridium, spiral elaters, and green spores. 
In all of these respects, except the character of the chromatophores, 
Megaceros resembles Dendroceros more than it does Anthoceros ; but 
the form of the thallus and the apical growth, at least in all of the forms 
examined by the writer, are like those of a typical Anthoceros. It may 
be noted here that Anthoceros Pearsoni , Howe, a common Californian 
species, has solitary antheridia, and it is interesting to note that the inner 
thallus cells very commonly show a double chromatophore. It is, therefore, 
to a certain extent intermediate between the typical species of Anthoceros 
and Megaceros. 
Both M. Tjibodensis (PI. XLIV, Fig. i) and M. Salakensis (Fig. 4) have 
a relatively large thallus, which in the former may reach a length of 5 cm. 
or more, with a breadth of about 1 cm. Of the different forms which seem 
to belong to M. Tjibodensis , the largest were growing upon boulders and 
upon the earth. These have a thicker thallus than the typical form shown 
in Fig. 1, and may possibly be specifically distinct. In the type the 
thallus is rather thin, with a conspicuously lobed and strongly laciniate 
margin (Fig. 6). The laciniate character is somewhat less marked in 
the stouter rock form (Fig. 7). 
M. Salakensis is somewhat smaller in all its parts, and the margin 
of the thallus is lobed, but does not show the laciniate margin so marked 
in M. Tjibodensis (Fig. 8). The sporogonium in M. Salakensis is also very 
much shorter than in M. Tjibodensis. In the latter it may reach a length 
of 9 cm. (see Fig. 3), while in M. Salakensis the largest specimens found 
were less than half as long (Fig. 5). In the latter species also, the ripe 
sporogonium opens along one suture instead of dividing into two valves, 
which is the rule in M. Tjibodensis. In this respect, as well as in some 
others, M. Salakensis resembles Dendroceros more nearly than does 
