496 The Philippine Journal of Science 1922 
kind has four embryo daughters distributed symmetrically 
about the hinder pole and dominating the hinder two-fifths 
of the coenobium. The forward fifth is without reproductive 
bodies and in the remaining two-fifths or less are oogonidia 
that form a zone around the coenobium. The oogonia are more 
advanced in development on the forward side of the zone, and 
more backward toward the hinder side of the zone. Among the 
oogonia are the sites of six or more antheridia that are marked 
by empty places. In another mixed coenobium with four daugh- 
ters the zones of sexual and asexual bodies are not so far sep- 
arated. In still another there is present also, among the oogo- 
nia, a rather large sperm globoid. In one case there are two 
daughters with a small number of oogonia, and in another two 
daughters with a rather large number of oogonia. In a similar 
lot of material there are two cases of coenobia with a group 
of five embryo daughters and a zone of oogonia. In one of 
these the zone of oogonia is narrower on one side. 
It appears from consideration of the aforementioned cases 
that in this species the asexual and sexual reproductive bodies 
are typically formed in separate coenobia; also, that the male 
and female bodies are formed in the same coenobia, the former 
maturing first; and, further, that when occasionally sexual and 
asexual bodies are formed in the same coenobium they are dis- 
tributed as if in different segments of the coenobium. In the 
cases described the asexual bodies are in hinder segments, the 
Sexual in intermediate segments, and nothing in the forward 
segments. 
The size of the mature asexual coenobia is not shown by any 
of the material at hand. Referring to the largest pictured 
specimen (Plate 3, fig. 11) we find that this coenobium, having 
daughters of about 80 » diameter, measures about 750 ». In 
view of the fact that the daughters probably grow to more than 
300 » diameter before birth it is evident that robust asexual 
coenobia when mature reach a diameter of about 1,000 un. 
VOLVOX BARBERI Sp. nov. 
The specimen represented by Plate 4, figs. 13 and 14, has 
been selected for the type of this species. This specimen ap- 
pears to have been fixed in a chrom-acetic solution, lightly 
Stained with a reddish stain, and mounted with others from 
the same collection under a sealed cover in glycerine which had 
been concentrated from a 10 per cent solution by evaporation. 
The upper and lower sides of the specimen require a differ- 
ence in focus of about 370 ». An estimate of the thickness 
