Campbell. — Shi dies on some Javanese A nthocerotaceae. II. 93 
The antheridia of this species, which are very large, occur upon short 
lateral branches (Fig. 2 J), and in this respect also the plant resembles 
Leitgeb’s figures and description of D. javanicus . 
The sporogonium is not very long, being only about 1 cm. in length, 
but is relatively stout, and opens along one suture (Fig. 3). The delicate 
columella may be seen projecting from the opening. The involucre is 
about half the length of the sporogonium. 
The second species was found at Tjibodas, but only in a very limited 
area. As already stated, it was growing among mosses and liverworts upon 
the trunks of a few trees near the edge of the forest adjoining the garden. 
Although repeated search was made at other places, no more specimens 
were found. It is an excessively delicate little plant, and hard to recognize 
except when in fruit. It is only about one-third the size of the other 
species, and the thallus is dichotomously branched (Fig. 4). The wings of 
the thallus are very little folded or lobed, and the plant looks almost like a 
Metzgeria , and is not much larger than the common species of that genus. 
The wings contain very conspicuous lacunae (Fig. 6), in which respect it 
differs strikingly from the species A, but agrees with Leitgeb’s account of 
D. javanicus. There are no lacunae in the midrib. 
The antheridia and archegonia are both upon the same shoots, and the 
antheridia are much smaller than in the species A. The sporogonia are 
very slender, but are longer than in species A. The involucre is long, and 
the dehiscence is along one suture as in the other species (Fig. 5). 
The Anatomy of the Thallus. 
The form of the apical cell and its segmentation agree entirely with 
those of the other species that have already been investigated. The form 
of the apical cell (see Figs. 8 and 9) is very much like that of Pellia 
epiphylla and that of the prothallium of most Ferns, and it differs from that 
of the other genera of Anthocerotaceae in its forming basal segments extend- 
ing the whole depth of the thallus. The two species are alike in the form 
and segmentation of the apical cell, but the species A has a thicker midrib 
and develops the conspicuous intercellular species already referred to 
(Fig. 9, /). These spaces are quite absent from the species B. 
As in most Anthocerotaceae, each cell of the thallus contains a single 
large chromatophore, in which is a very distinct pyrenoid (Fig. 7,/). The 
nucleus, n, is small and not at all conspicuous, but it is readily demonstrated. 
The Reproductive Organs. 
The archegonia (Figs. 9 to 12) are not in any way different from those 
of the other species that have been examined, and closely resemble those 
of Anthoceros. The neck- cel Is are usually slightly broader than in 
