96 The Philippine Journal of Science 1922 
terior quartet consists of three asexual and one male coenobia. 
Within the mother coenobium, near the cleft, there is an 
anomalous object consisting of an irregularly shaped and bent 
sheet of hundreds of small cells. It is like a piece torn out 
of the somatic layer of one of the asexual offspring, but the 
cells are much smaller. The mother coenobium in its flattened 
condition measured, in 1919, about 678 by 685 ». The corre- 
sponding dimensions of the photomicrograph are 650 and 660 pn, 
which indicates that three years of drying have brought the 
cover glass closer to the slide and squeezed the large specimens 
flatter, thus making them wider. The specimen measured 
about 112 » in thickness. The somatic protoplasts are about 
6 to 7.1 » thick. The outer walls of the somatic cells are 
slightly convex, especially around the anterior pole, giving the 
surface of the coenobium a wavy appearance in optical section. 
The spacing of the somatic cells is about as follows: Forward, 
22 »; in the middle, 17 »; at the back, 18 »; average, about 
17.5. The consequent estimate of somatic cells is 5,480.2 Each 
asexual daughter contains eight gonidia, and over each gonidium 
there is a vacant place in the layer of somatic cells. The 
daughter nearest the middle of the picture is 210 » wide and 
230 » long. Its somatic protoplasts are about 3.6 p» wide, and 
their centers are about 4.1 » apart. The number of cells in- 
dicated by these figures is 10,100. The gonidia are about 30 pb 
in diameter. There are pressure creases in the coenobium walls 
of two of the daughters. Of the male offspring, the lower is 
240 by 280 y, the right one 240 by 290 p, and the upper one 
260 by 270 ». The last of these has somatic protoplasts about 
5.3 to 5.4 » thick and spaced 10 » between centers. The estimate 
of somatic cells is 2,500.2 Seattered throughout the periphery 
of the coenobial cavity are 112 or more androgonidia, the cells 
which produce, by dividing, the bundles or platelets of sperms, 
mostly with one or two of the segmentation divisions accom- 
plished. A few undivided ones are 10, 14, and 16 p wide. Those 
in the 2-celled stage are mostly about 17 by 19 », and those 
in the 4-celled stage about 19 » each way. The counting of the 
androgonidia was done by making a camera lucida sketch, 
in which difficulty was experienced due to overlapping of the 
progeny in their flattened condition. The number is evidently 
about the same in all, and is in the neighborhood of 120. 
*The estimate is probably much too high on account of the flattening 
of the coenobium. 
