212 The Philippine Journal of Science 1922 
mother measures 560 by 604 ». The cell spacing is about 9 p, 
and the number of cells is about 14,700. The embryo daughters 
measure from 62 to 75 » and have their cells about 7 » wide. 
The number of cells in these embryos is between 256 and 512. 
Specimen 5.—Plate 2, fig. 7. This coenobium, which also is 
shown on a smaller scale, contains four embryo daughters. The 
mother measures about 472 by 517 ». The cell spacing is about 
12 », and the number of cells is about 6,000. The daughters 
measure about 125 by 118 », being wider than long, and their 
average cells measure about 6 by 9 » and have very thin walls. 
The number of their cells is about 1,024; that is to say, ten 
divisions have been accomplished. The capsules of the daugh- 
ters are separated from their somatic cells by distances of 
about 10 » around the equators, but are in contact with both 
poles of the daughters. 
Specimen 6.—Plate 3, fig. 11. A coenobium with ten embryo 
daughters. The preparation bearing this and the next specimen 
dried up before measurements were made. From the picture 
we find the dimensions to be about 590 by 620 »; the spacing 
of the cells, about 9 »; and the number of cells, about 16,000. 
The embryo daughters are about 100 and 110 » in diameter. 
Specimen 7.—Plate 4, fig. 16. This is a more-mature coeno- 
bium with only six daughters. Measurement of the photograph 
gives dimensions of 630 by 700 » and cell spacing about 12 x. 
The number of cells is about 10,900. The largest daughter 
measures about 200 by 230 uz. 
Specimen 8.—Plate 4, fig. 14. A less-mature coenobium with 
ten daughters. The mother measures about 680 by 720 ,; it 
has cells spaced about 12 » and numbering about 12,000. The 
daughters are about 130 to 160 » in diameter. The unclosed 
phialopores of the two nearer daughters can be seen in the 
picture. In all observed cases this opening is directly under- 
neath the vacant space left in the somatic layer by the cell that 
became the gonidium. 
YOUNG COENOBIA 
In both of the collections from which the specimens already 
described were selected there occur sexual coenobia. In the 
glycerine preparations from Pond J they are present in a great 
variety of stages, from unborn to nearly mature. They occur 
in the same mother with asexual daughters in ‘various pro- 
portions. Measurements of some of these will serve to show 
